diff --git a/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/Device.java b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/Device.java
new file mode 100644
index 00000000..c0562d82
--- /dev/null
+++ b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/Device.java
@@ -0,0 +1,36 @@
+package com.whoz_in.api_query_jpa.device;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.JoinColumn;
+import jakarta.persistence.OneToMany;
+import java.util.List;
+import java.util.UUID;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.hibernate.annotations.Immutable;
+import org.hibernate.annotations.Subselect;
+
+@Entity
+@Getter
+@Subselect("SELECT d.id , d.member_id "
+        + "FROM device_entity d")
+@Immutable
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Device {
+
+    @Id
+    @Column(name = "id", nullable = false)
+    private UUID id;
+
+    @Column(name ="member_id", nullable = false)
+    private UUID memberId;
+
+    @OneToMany(fetch = FetchType.LAZY)
+    @JoinColumn(name = "device_id", referencedColumnName = "id")
+    private List<DeviceInfo> deviceInfos;
+
+}
\ No newline at end of file
diff --git a/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfo.java b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfo.java
new file mode 100644
index 00000000..67583b8a
--- /dev/null
+++ b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfo.java
@@ -0,0 +1,28 @@
+package com.whoz_in.api_query_jpa.device;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import java.util.UUID;
+import lombok.AccessLevel;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+import org.hibernate.annotations.Immutable;
+import org.hibernate.annotations.Subselect;
+
+@Entity
+@Getter
+@Subselect("SELECT di.id, di.device_id, di.mac, di.ssid "
+        + "FROM device_info_entity di")
+@Immutable
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class DeviceInfo {
+
+    @Id
+    private Long id;
+
+    private UUID deviceId;
+
+    private String mac;
+
+    private String ssid;
+}
\ No newline at end of file
diff --git a/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoJpaViewer.java b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoJpaViewer.java
new file mode 100644
index 00000000..bc593da1
--- /dev/null
+++ b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoJpaViewer.java
@@ -0,0 +1,21 @@
+package com.whoz_in.api_query_jpa.device;
+
+import com.whoz_in.main_api.query.device.view.DeviceInfoViewer;
+import com.whoz_in.main_api.query.device.view.RegisteredSsids;
+import java.util.UUID;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+
+@Component
+@RequiredArgsConstructor
+public class DeviceInfoJpaViewer implements DeviceInfoViewer {
+    private final DeviceInfoRepository deviceInfoRepository;
+    @Override
+    public RegisteredSsids findRegisteredSsids(UUID ownerId, String room, String mac) {
+        return new RegisteredSsids(
+                deviceInfoRepository.findAllByMac(ownerId, room, mac).stream()
+                        .map(DeviceInfo::getSsid)
+                        .toList());
+    }
+}
diff --git a/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoRepository.java b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoRepository.java
new file mode 100644
index 00000000..2f2c4306
--- /dev/null
+++ b/modules/infrastructure/api-query-jpa/src/main/java/com/whoz_in/api_query_jpa/device/DeviceInfoRepository.java
@@ -0,0 +1,18 @@
+package com.whoz_in.api_query_jpa.device;
+
+import java.util.List;
+import java.util.UUID;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+
+public interface DeviceInfoRepository extends JpaRepository<DeviceInfo, Long> {
+    @Query(value = "SELECT di.id, di.device_id AS deviceId, di.mac, di.ssid " +
+            "FROM device_entity d " +
+            "JOIN device_info_entity di ON d.id = di.device_id " +
+            "WHERE d.member_id = :ownerId " +
+            "AND di.room = :room " +
+            "AND di.mac = :mac",
+            nativeQuery = true)
+    List<DeviceInfo> findAllByMac(@Param("ownerId") UUID ownerId, @Param("room") String room, @Param("mac") String mac);
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoAddHandler.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoAddHandler.java
index bc34afe5..e96bcd60 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoAddHandler.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoAddHandler.java
@@ -1,8 +1,6 @@
 package com.whoz_in.main_api.command.device.application;
 
 import com.whoz_in.domain.device.DeviceRepository;
-import com.whoz_in.domain.device.model.DeviceInfo;
-import com.whoz_in.domain.device.model.MacAddress;
 import com.whoz_in.domain.device.service.DeviceOwnershipService;
 import com.whoz_in.domain.member.model.MemberId;
 import com.whoz_in.domain.member.service.MemberFinderService;
@@ -11,6 +9,8 @@
 import com.whoz_in.domain.network_log.MonitorLogRepository;
 import com.whoz_in.main_api.command.shared.application.CommandHandler;
 import com.whoz_in.main_api.shared.application.Handler;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfo;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfoStore;
 import com.whoz_in.main_api.shared.utils.RequesterInfo;
 import java.time.LocalDateTime;
 import lombok.RequiredArgsConstructor;
@@ -20,7 +20,7 @@
 @RequiredArgsConstructor
 public class DeviceInfoAddHandler implements CommandHandler<DeviceInfoAdd, Void> {
     private final RequesterInfo requesterInfo;
-    private final DeviceInfoStore deviceInfoStore;
+    private final TempDeviceInfoStore tempDeviceInfoStore;
     private final MemberFinderService memberFinderService;
     private final DeviceOwnershipService deviceOwnershipService;
     private final DeviceRepository deviceRepository;
@@ -41,9 +41,9 @@ public Void handle(DeviceInfoAdd req) {
         String mac = managedLog.getMac();
 
         //등록할 DeviceInfo 생성
-        DeviceInfo deviceInfo = DeviceInfo.create(req.room(), managedLog.getSsid(), MacAddress.create(mac));
+        TempDeviceInfo deviceInfo = new TempDeviceInfo(req.room(), managedLog.getSsid(), mac);
         //이미 등록된 DeviceInfo가 아닌지 미리 확인
-        deviceInfoStore.mustNotExist(requesterId, deviceInfo);
+        tempDeviceInfoStore.mustNotExist(requesterId.id(), deviceInfo);
 
         //모니터 로그에서 현재 접속 중인 맥이 있는지 확인 (넉넉하게 15분)
         monitorLogRepository.mustExistAfter(mac, LocalDateTime.now().minusMinutes(15));
@@ -56,7 +56,7 @@ public Void handle(DeviceInfoAdd req) {
         });
 
         //마침내! DeviceInfo를 추가한다.
-        deviceInfoStore.add(requesterId, deviceInfo);
+        tempDeviceInfoStore.add(requesterId.id(), deviceInfo);
 
         return null;
     }
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceRegisterHandler.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceRegisterHandler.java
index b6a6533f..61faa5d8 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceRegisterHandler.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceRegisterHandler.java
@@ -3,11 +3,13 @@
 import com.whoz_in.domain.device.DeviceRepository;
 import com.whoz_in.domain.device.model.Device;
 import com.whoz_in.domain.device.model.DeviceInfo;
+import com.whoz_in.domain.device.model.MacAddress;
 import com.whoz_in.domain.member.model.MemberId;
 import com.whoz_in.domain.member.service.MemberFinderService;
 import com.whoz_in.domain.shared.event.EventBus;
 import com.whoz_in.main_api.command.shared.application.CommandHandler;
 import com.whoz_in.main_api.shared.application.Handler;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfoStore;
 import com.whoz_in.main_api.shared.utils.RequesterInfo;
 import java.util.List;
 import lombok.RequiredArgsConstructor;
@@ -17,7 +19,7 @@
 @RequiredArgsConstructor
 public class DeviceRegisterHandler implements CommandHandler<DeviceRegister, Void> {
     private final RequesterInfo requesterInfo;
-    private final DeviceInfoStore deviceInfoStore;
+    private final TempDeviceInfoStore tempDeviceInfoStore;
     private final MemberFinderService memberFinderService;
     private final DeviceRepository deviceRepository;
     private final EventBus eventBus;
@@ -28,9 +30,12 @@ public Void handle(DeviceRegister cmd) {
         MemberId requesterId = requesterInfo.getMemberId();
         memberFinderService.mustExist(requesterId);
 
-        deviceInfoStore.verifyAllAdded(requesterId, cmd.room());
+        tempDeviceInfoStore.verifyAllAdded(requesterId.id(), cmd.room());
 
-        List<DeviceInfo> deviceInfos = deviceInfoStore.takeout(requesterId);
+        List<DeviceInfo> deviceInfos = tempDeviceInfoStore.takeout(requesterId.id())
+                .stream()
+                .map(cdi-> DeviceInfo.create(cdi.getRoom(), cdi.getSsid(), MacAddress.create(cdi.getMac())))
+                .toList();
 
         Device device = Device.create(requesterId, deviceInfos, cmd.deviceName());
         deviceRepository.save(device);
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/presentation/DeviceController.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/presentation/DeviceController.java
index 004484a7..97cdd6ac 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/presentation/DeviceController.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/presentation/DeviceController.java
@@ -4,7 +4,9 @@
 import com.whoz_in.main_api.command.device.application.DeviceRegister;
 import com.whoz_in.main_api.command.shared.application.CommandBus;
 import com.whoz_in.main_api.command.shared.presentation.CommandController;
+import com.whoz_in.main_api.shared.presentation.ResponseEntityGenerator;
 import com.whoz_in.main_api.shared.presentation.SuccessBody;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -22,12 +24,12 @@ public DeviceController(CommandBus commandBus) {
     @PostMapping("/device/info")
     public ResponseEntity<SuccessBody<Void>> addDeviceInfo(@RequestBody DeviceInfoAdd request) {
         dispatch(request);
-        return null;
+        return ResponseEntityGenerator.success("기기 정보 등록 완료", HttpStatus.CREATED);
     }
 
     @PostMapping("/device")
     public ResponseEntity<SuccessBody<Void>> registerDevice(@RequestBody DeviceRegister request) {
         dispatch(request);
-        return null;
+        return ResponseEntityGenerator.success("기기 등록 완료", HttpStatus.CREATED);
     }
 }
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpController.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpController.java
new file mode 100644
index 00000000..d8153af7
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpController.java
@@ -0,0 +1,22 @@
+package com.whoz_in.main_api.command.private_ip;
+
+import com.whoz_in.main_api.command.shared.application.CommandBus;
+import com.whoz_in.main_api.command.shared.presentation.CommandController;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1")
+public class PrivateIpController extends CommandController {
+
+    public PrivateIpController(CommandBus commandBus) {
+        super(commandBus);
+    }
+
+    @PutMapping("/private-ip")
+    public void updatePrivateIp(@RequestBody PrivateIpUpdate req){
+        dispatch(req);
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdate.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdate.java
new file mode 100644
index 00000000..78e7ea64
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdate.java
@@ -0,0 +1,15 @@
+package com.whoz_in.main_api.command.private_ip;
+
+import com.whoz_in.domain.device.model.IpAddress;
+import com.whoz_in.main_api.command.shared.application.Command;
+import java.util.Map;
+
+public record PrivateIpUpdate(
+        String room,
+        Map<String, String> privateIpList //Map<와이파이이름, 아이피>
+) implements Command {
+
+    public PrivateIpUpdate {
+        privateIpList.values().forEach(IpAddress::create); //아이피 형식 검증
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdateHandler.java b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdateHandler.java
new file mode 100644
index 00000000..4f30dd3f
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/command/private_ip/PrivateIpUpdateHandler.java
@@ -0,0 +1,18 @@
+package com.whoz_in.main_api.command.private_ip;
+
+import com.whoz_in.main_api.command.shared.application.CommandHandler;
+import com.whoz_in.main_api.shared.application.Handler;
+import com.whoz_in.main_api.shared.caching.private_ip.PrivateIpStore;
+import lombok.RequiredArgsConstructor;
+
+@Handler
+@RequiredArgsConstructor
+public class PrivateIpUpdateHandler implements CommandHandler<PrivateIpUpdate, Void> {
+    private final PrivateIpStore privateIpStore;
+
+    @Override
+    public Void handle(PrivateIpUpdate command) {
+        privateIpStore.put(command.room(), command.privateIpList());
+        return null;
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityConfig.java b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityConfig.java
index a8f2dc1c..d2d9c38b 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityConfig.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityConfig.java
@@ -25,6 +25,15 @@ public FilterRegistrationBean<JwtAuthenticationFilter> jwtAuthenticationFilterRe
         return registrationBean;
     }
 
+    //위와 동일한 이유로 추가
+    @Bean
+    public FilterRegistrationBean<ServerAuthenticationFilter> serverAuthenticationFilterRegistration(
+            ServerAuthenticationFilter serverAuthenticationFilter) {
+        FilterRegistrationBean<ServerAuthenticationFilter> registrationBean = new FilterRegistrationBean<>(serverAuthenticationFilter);
+        registrationBean.setEnabled(false);
+        return registrationBean;
+    }
+
     @Bean
     public PasswordEncoder passwordEncoder() {
         return new BCryptPasswordEncoder();
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityFilterChainConfig.java b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityFilterChainConfig.java
index 65a5a2b8..9c4aa98b 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityFilterChainConfig.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SecurityFilterChainConfig.java
@@ -23,9 +23,25 @@ public class SecurityFilterChainConfig {
     private final ClientRegistrationRepository clientRegistrationRepository;
     private final LoginSuccessHandler loginSuccessHandler;
     private final LoginFailureHandler loginFailureHandler;
+    private final ServerAuthenticationFilter serverAuthenticationFilter;
     private final JwtAuthenticationFilter jwtAuthenticationFilter;
     private final CorsConfigurationSource corsConfigurationSource;
 
+    @Bean
+    @Order(0)
+    public SecurityFilterChain serverToServerFilterChain(HttpSecurity httpSecurity) throws Exception {
+        httpSecurity.securityMatcher(
+                "/api/v1/private-ip"
+        );
+
+        commonConfigurations(httpSecurity);
+        httpSecurity.logout(AbstractHttpConfigurer::disable);
+        //TODO: ip 화이트 리스트
+        httpSecurity.addFilterAt(serverAuthenticationFilter, LogoutFilter.class);
+
+        return httpSecurity.build();
+    }
+
     @Bean
     @Order(1)
     public SecurityFilterChain oauth2FilterChain(HttpSecurity httpSecurity) throws Exception {
@@ -50,7 +66,7 @@ public SecurityFilterChain oauth2FilterChain(HttpSecurity httpSecurity) throws E
         return httpSecurity.build();
     }
 
-    //POST, PUT, PATCH, DELETE 중 인증인가 필요 없는 엔드포인트
+    //인증인가 필요 없는 엔드포인트
     @Bean
     @Order(2)
     public SecurityFilterChain noAuthenticationFilterChain(HttpSecurity httpSecurity) throws Exception {
@@ -77,6 +93,10 @@ public SecurityFilterChain authenticationFilterChain(HttpSecurity httpSecurity)
         );
         httpSecurity.authorizeHttpRequests(auth-> {
             //인증 필요
+            auth.requestMatchers(HttpMethod.GET,
+                    "/api/v1/device/info-status",
+                    "/api/v1/private-ip/*"
+            ).authenticated();
             auth.requestMatchers(HttpMethod.POST,
                     "/api/v1/device",
                     "/api/v1/device/info"
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/ServerAuthenticationFilter.java b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/ServerAuthenticationFilter.java
new file mode 100644
index 00000000..131059f2
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/ServerAuthenticationFilter.java
@@ -0,0 +1,37 @@
+package com.whoz_in.main_api.config.security;
+
+import jakarta.servlet.FilterChain;
+import jakarta.servlet.ServletException;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.util.Optional;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.stereotype.Component;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+@Component
+public class ServerAuthenticationFilter extends OncePerRequestFilter {
+    private final String apiKey;
+
+    public ServerAuthenticationFilter(@Value("${api-key}") String apiKey) {
+        this.apiKey = apiKey;
+    }
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
+            FilterChain filterChain) throws ServletException, IOException {
+        Optional<String> extractedKey = extractApiKey(request);
+
+        if (extractedKey.filter(apiKey::equals).isEmpty()) {
+            response.sendError(HttpServletResponse.SC_UNAUTHORIZED, "Invalid API Key");
+            return;
+        }
+
+        filterChain.doFilter(request, response);
+    }
+
+    private Optional<String> extractApiKey(HttpServletRequest request){
+        return Optional.ofNullable(request.getHeader("Authorization"));
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/utils/SpringSecurityRequesterInfo.java b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SpringSecurityRequesterInfo.java
similarity index 87%
rename from modules/main-api/src/main/java/com/whoz_in/main_api/shared/utils/SpringSecurityRequesterInfo.java
rename to modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SpringSecurityRequesterInfo.java
index 55762f3d..df159c33 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/utils/SpringSecurityRequesterInfo.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/config/security/SpringSecurityRequesterInfo.java
@@ -1,7 +1,7 @@
-package com.whoz_in.main_api.shared.utils;
+package com.whoz_in.main_api.config.security;
 
 import com.whoz_in.domain.member.model.MemberId;
-import com.whoz_in.main_api.config.security.JwtAuthentication;
+import com.whoz_in.main_api.shared.utils.RequesterInfo;
 import java.util.Optional;
 import lombok.RequiredArgsConstructor;
 import org.springframework.security.core.context.SecurityContextHolder;
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatus.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatus.java
new file mode 100644
index 00000000..e4533cc9
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatus.java
@@ -0,0 +1,20 @@
+package com.whoz_in.main_api.query.device.application;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.whoz_in.main_api.query.shared.application.Response;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfoStore;
+import java.util.Map;
+
+
+/**
+ * 이 클래스는 사용자가 등록해야 할 DeviceInfo들의 상태를 가지고 있다. <br>
+ *
+ * {@code isAddedPerSsid} 맵은 각 SSID의 임시 등록 여부를 나타낸다. <br>
+ * - Key는 사용자가 아직 등록하지 않은 SSID를 의미한다. (db에 없다는 말이다.) <br>
+ * - Value가 {@code true}인 경우, 해당 SSID는
+ *   {@link TempDeviceInfoStore}에 이미 등록된 것이다. <br>
+ *   모두 true라면 기기 등록을 완료할 수 있다. <br>
+ */
+public record TempDeviceInfosStatus(
+    @JsonProperty("status") Map<String, Boolean> isAddedPerSsid
+) implements Response {}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusGet.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusGet.java
new file mode 100644
index 00000000..bcbcf88e
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusGet.java
@@ -0,0 +1,8 @@
+package com.whoz_in.main_api.query.device.application;
+
+import com.whoz_in.main_api.query.shared.application.Query;
+
+public record TempDeviceInfosStatusGet(
+        String room,
+        String ip
+) implements Query {}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusHandler.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusHandler.java
new file mode 100644
index 00000000..9047b59a
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/application/TempDeviceInfosStatusHandler.java
@@ -0,0 +1,53 @@
+package com.whoz_in.main_api.query.device.application;
+
+import com.whoz_in.domain.network_log.ManagedLog;
+import com.whoz_in.domain.network_log.ManagedLogRepository;
+import com.whoz_in.main_api.config.RoomSsidConfig;
+import com.whoz_in.main_api.query.device.view.DeviceInfoViewer;
+import com.whoz_in.main_api.query.shared.application.QueryHandler;
+import com.whoz_in.main_api.shared.application.Handler;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfo;
+import com.whoz_in.main_api.shared.caching.device.TempDeviceInfoStore;
+import com.whoz_in.main_api.shared.utils.RequesterInfo;
+import java.time.LocalDateTime;
+import java.util.List;
+import java.util.Map;
+import java.util.UUID;
+import java.util.stream.Collectors;
+import lombok.RequiredArgsConstructor;
+
+@Handler
+@RequiredArgsConstructor
+public class TempDeviceInfosStatusHandler implements QueryHandler<TempDeviceInfosStatusGet, TempDeviceInfosStatus> {
+    private final RoomSsidConfig ssidConfig;
+    private final RequesterInfo requesterInfo;
+    private final DeviceInfoViewer deviceInfoViewer;
+    private final TempDeviceInfoStore tempDeviceInfoStore;
+    private final ManagedLogRepository managedLogRepository;
+
+    @Override
+    public TempDeviceInfosStatus handle(TempDeviceInfosStatusGet query) {
+        UUID requesterId = requesterInfo.getMemberId().id();
+
+        // 사용자의 기기를 맥으로 찾기 위해 로그를 가져옴
+        ManagedLog log = managedLogRepository.getLatestByRoomAndIpAfter(
+                query.room(), query.ip(), LocalDateTime.now().minusDays(1)); //이거 managed log가 판단해야 함
+        // 방에 존재하는 와이파이들
+        List<String> roomSsids = ssidConfig.getSsids(query.room());
+        // 사용자가 이전에 등록한 기기 정보를 가져옴
+        List<String> registeredSsids = deviceInfoViewer
+                .findRegisteredSsids(requesterId, query.room(), log.getMac())
+                .ssids();
+        // 임시로 등록한 기기 정보를 가져옴
+        List<TempDeviceInfo> addedTempDeviceInfos = tempDeviceInfoStore.get(requesterId);
+        // 방에 존재하는 와이파이 중 이전에 등록한 와이파이를 제외하고 임시로 등록되었는지를 체크함
+        Map<String, Boolean> isAddedPerSsid = roomSsids.stream()
+                .filter(ssid -> !registeredSsids.contains(ssid)) //등록되지 않은 ssid만 남김
+                .collect(Collectors.toMap(
+                        ssid -> ssid,
+                        ssid -> addedTempDeviceInfos.stream()
+                                .anyMatch(tdi -> tdi.getSsid().equals(ssid))
+                ));
+        return new TempDeviceInfosStatus(isAddedPerSsid);
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/presentation/DeviceQueryController.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/presentation/DeviceQueryController.java
new file mode 100644
index 00000000..927fa0f3
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/presentation/DeviceQueryController.java
@@ -0,0 +1,30 @@
+package com.whoz_in.main_api.query.device.presentation;
+
+import com.whoz_in.main_api.query.device.application.TempDeviceInfosStatus;
+import com.whoz_in.main_api.query.device.application.TempDeviceInfosStatusGet;
+import com.whoz_in.main_api.query.shared.application.QueryBus;
+import com.whoz_in.main_api.query.shared.presentation.QueryController;
+import com.whoz_in.main_api.shared.presentation.CrudResponseCode;
+import com.whoz_in.main_api.shared.presentation.ResponseEntityGenerator;
+import com.whoz_in.main_api.shared.presentation.SuccessBody;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1")
+public class DeviceQueryController extends QueryController {
+
+    public DeviceQueryController(QueryBus queryBus) {
+        super(queryBus);
+    }
+
+    @GetMapping("/device/info-status")
+    public ResponseEntity<SuccessBody<TempDeviceInfosStatus>> getTempDeviceInfosStatus(@RequestParam String room, @RequestParam String ip){
+        return ResponseEntityGenerator.success(
+                ask(new TempDeviceInfosStatusGet(room, ip)),
+                CrudResponseCode.READ);
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/DeviceInfoViewer.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/DeviceInfoViewer.java
new file mode 100644
index 00000000..e3fc4eae
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/DeviceInfoViewer.java
@@ -0,0 +1,8 @@
+package com.whoz_in.main_api.query.device.view;
+
+import com.whoz_in.main_api.query.shared.application.Viewer;
+import java.util.UUID;
+
+public interface DeviceInfoViewer extends Viewer {
+    RegisteredSsids findRegisteredSsids(UUID ownerId, String room, String mac);
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/RegisteredSsids.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/RegisteredSsids.java
new file mode 100644
index 00000000..7e58aa7d
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/device/view/RegisteredSsids.java
@@ -0,0 +1,8 @@
+package com.whoz_in.main_api.query.device.view;
+
+import com.whoz_in.main_api.query.shared.application.View;
+import java.util.List;
+
+public record RegisteredSsids(
+    List<String> ssids
+) implements View {}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpList.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpList.java
new file mode 100644
index 00000000..3ecf46db
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpList.java
@@ -0,0 +1,8 @@
+package com.whoz_in.main_api.query.private_ip;
+
+import com.whoz_in.main_api.query.shared.application.Response;
+import java.util.List;
+
+public record PrivateIpList(
+        List<String> ipList
+) implements Response {}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGet.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGet.java
new file mode 100644
index 00000000..44e441d3
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGet.java
@@ -0,0 +1,7 @@
+package com.whoz_in.main_api.query.private_ip;
+
+import com.whoz_in.main_api.query.shared.application.Query;
+
+public record PrivateIpListGet(
+  String room
+) implements Query {}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGetHandler.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGetHandler.java
new file mode 100644
index 00000000..f80f1094
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpListGetHandler.java
@@ -0,0 +1,17 @@
+package com.whoz_in.main_api.query.private_ip;
+
+import com.whoz_in.main_api.query.shared.application.QueryHandler;
+import com.whoz_in.main_api.shared.application.Handler;
+import com.whoz_in.main_api.shared.caching.private_ip.PrivateIpStore;
+import lombok.RequiredArgsConstructor;
+
+@Handler
+@RequiredArgsConstructor
+public class PrivateIpListGetHandler implements QueryHandler<PrivateIpListGet, PrivateIpList> {
+    private final PrivateIpStore privateIpStore;
+    @Override
+    public PrivateIpList handle(PrivateIpListGet query) {
+        return new PrivateIpList(privateIpStore.get(query.room()).values().stream()
+                .toList());
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpQueryController.java b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpQueryController.java
new file mode 100644
index 00000000..164a5404
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/query/private_ip/PrivateIpQueryController.java
@@ -0,0 +1,25 @@
+package com.whoz_in.main_api.query.private_ip;
+
+import com.whoz_in.main_api.query.shared.application.QueryBus;
+import com.whoz_in.main_api.query.shared.presentation.QueryController;
+import com.whoz_in.main_api.shared.presentation.CrudResponseCode;
+import com.whoz_in.main_api.shared.presentation.ResponseEntityGenerator;
+import com.whoz_in.main_api.shared.presentation.SuccessBody;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1")
+public class PrivateIpQueryController extends QueryController {
+    public PrivateIpQueryController(QueryBus queryBus) {
+        super(queryBus);
+    }
+
+    @GetMapping("/private-ip/{room}")
+    public ResponseEntity<SuccessBody<PrivateIpList>> getPrivateIps(@PathVariable String room){
+        return ResponseEntityGenerator.success(ask(new PrivateIpListGet(room)), CrudResponseCode.READ);
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfo.java b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfo.java
new file mode 100644
index 00000000..0f10cc05
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfo.java
@@ -0,0 +1,15 @@
+package com.whoz_in.main_api.shared.caching.device;
+
+import lombok.EqualsAndHashCode;
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@EqualsAndHashCode
+@RequiredArgsConstructor
+public final class TempDeviceInfo {
+    private final String room;
+    private final String ssid;
+    @EqualsAndHashCode.Exclude
+    private final String mac;
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoStore.java b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfoStore.java
similarity index 53%
rename from modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoStore.java
rename to modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfoStore.java
index 4651e0e6..8f054fe5 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/command/device/application/DeviceInfoStore.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/device/TempDeviceInfoStore.java
@@ -1,11 +1,10 @@
-package com.whoz_in.main_api.command.device.application;
+package com.whoz_in.main_api.shared.caching.device;
 
 import com.google.common.cache.Cache;
 import com.google.common.cache.CacheBuilder;
-import com.whoz_in.domain.device.model.DeviceInfo;
-import com.whoz_in.domain.member.model.MemberId;
 import com.whoz_in.main_api.config.RoomSsidConfig;
 import java.util.List;
+import java.util.UUID;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
@@ -15,30 +14,31 @@
 
 /**
  * 사전 지식: 사용자는 기기 등록을 위해선 해당 방에 존재하는 와이파이에 대한 맥을(DeviceInfo) 가지고 있어야 하며, 모두 가지면 기기 등록을 시작할 수 있다.
- * 따라서 이 클래스는 기기 등록 전까지 맥을 임시 저장 및 관리하는 책임을 가진다.
- * (연결 시마다 맥이 바뀌도록 설정한 기기도 있기 때문에 시간 제한을 뒀다.)
+ * 책임: 따라서 이 클래스는 기기 등록 전까지 맥을 임시 저장 및 관리하는 책임을 가진다.
+ * 주의: command, query side에서 공용으로 사용하는 것이므로 어느 한 쪽에 의존하는 클래스를 사용하지 않도록 한다.
+ * 참고: 연결 시마다 맥이 바뀌도록 설정한 기기도 있기 때문에 시간 제한을 뒀다.
  */
 @Component
 @RequiredArgsConstructor
-public final class DeviceInfoStore {
-    private static final Cache<MemberId, CopyOnWriteArrayList<DeviceInfo>> store = CacheBuilder.newBuilder()
+public final class TempDeviceInfoStore {
+    private static final Cache<UUID, CopyOnWriteArrayList<TempDeviceInfo>> store = CacheBuilder.newBuilder()
             .expireAfterAccess(5, TimeUnit.MINUTES) // 5분 동안 접근이 없으면 만료
             .build();
 
     private final RoomSsidConfig ssidConfig;
 
 
-    //이전에 등록되지 않은 DeviceInfo인지 검증
-    public void mustNotExist(MemberId ownerId, DeviceInfo deviceInfo){
-        List<DeviceInfo> deviceInfos = store.getIfPresent(ownerId);
-        if (deviceInfos != null && deviceInfos.stream().anyMatch(di->isInSameRoomAndWifi(di, deviceInfo)))
+    //이전에 등록되지 않은 TempDeviceInfo인지 검증
+    public void mustNotExist(UUID ownerId, TempDeviceInfo deviceInfo){
+        List<TempDeviceInfo> deviceInfos = store.getIfPresent(ownerId);
+        if (deviceInfos != null && deviceInfos.stream().anyMatch(di->di.equals(deviceInfo)))
             throw new IllegalArgumentException("이미 등록됨");
     }
 
     //TODO: deviceInfo들에 room이 있는데 room을 굳이 받아야 하나
-    //room의 모든 와이파이에 대해 DeviceInfo가 추가되었는지 검증
-    public void verifyAllAdded(MemberId ownerId, String room){
-        List<DeviceInfo> deviceInfos = get(ownerId);
+    //room의 모든 와이파이에 대해 CachedDevice가 추가되었는지 검증
+    public void verifyAllAdded(UUID ownerId, String room){
+        List<TempDeviceInfo> deviceInfos = get(ownerId);
         List<String> unregisteredSsids = ssidConfig.getSsids(room).stream()
                 .filter(ssid -> deviceInfos.stream().noneMatch(di -> di.getSsid().equals(ssid)))
                 .toList();
@@ -48,10 +48,10 @@ public void verifyAllAdded(MemberId ownerId, String room){
     }
 
     //DeviceInfo 추가
-    public void add(MemberId ownerId, DeviceInfo newDeviceInfo) {
+    public void add(UUID ownerId, TempDeviceInfo newDeviceInfo) {
         try {
-            List<DeviceInfo> deviceInfos = store.get(ownerId, CopyOnWriteArrayList::new);
-            deviceInfos.removeIf(di-> isInSameRoomAndWifi(di, newDeviceInfo));
+            List<TempDeviceInfo> deviceInfos = store.get(ownerId, CopyOnWriteArrayList::new);
+            deviceInfos.removeIf(di-> di.equals(newDeviceInfo));
             deviceInfos.add(newDeviceInfo);
         } catch (ExecutionException e) {
             throw new IllegalStateException("value 초기화 실패");
@@ -59,24 +59,19 @@ public void add(MemberId ownerId, DeviceInfo newDeviceInfo) {
     }
 
     //불변 반환
-    public List<DeviceInfo> get(MemberId ownerId){
-        List<DeviceInfo> deviceInfos = store.getIfPresent(ownerId);
+    public List<TempDeviceInfo> get(UUID ownerId){
+        List<TempDeviceInfo> deviceInfos = store.getIfPresent(ownerId);
         return deviceInfos != null ? List.copyOf(deviceInfos) : List.of();
     }
 
-    public void remove(MemberId ownerId){
+    public void remove(UUID ownerId){
         store.invalidate(ownerId);
     }
 
     //반환 전 제거
-    public List<DeviceInfo> takeout(MemberId ownerId){
-        List<DeviceInfo> deviceInfos = get(ownerId);
+    public List<TempDeviceInfo> takeout(UUID ownerId){
+        List<TempDeviceInfo> deviceInfos = get(ownerId);
         remove(ownerId);
         return deviceInfos;
     }
-
-    //같은 방, 같은 와이파이에 대해 저장된 정보인지 확인
-    private boolean isInSameRoomAndWifi(DeviceInfo deviceInfo1, DeviceInfo deviceInfo2){
-        return deviceInfo1.getRoom().equals(deviceInfo2.getRoom()) && deviceInfo1.getSsid().equals(deviceInfo2.getSsid());
-    }
 }
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/private_ip/PrivateIpStore.java b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/private_ip/PrivateIpStore.java
new file mode 100644
index 00000000..6c424e72
--- /dev/null
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/caching/private_ip/PrivateIpStore.java
@@ -0,0 +1,31 @@
+package com.whoz_in.main_api.shared.caching.private_ip;
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.whoz_in.main_api.config.RoomSsidConfig;
+import java.util.Map;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+
+@Component
+@RequiredArgsConstructor
+public final class PrivateIpStore {
+    //Cache<방, Map<SSID, 내부 아이피>>
+    private static final Cache<String, Map<String, String>> store = CacheBuilder.newBuilder().build();
+    private final RoomSsidConfig ssidConfig;
+
+    public void put(String room, Map<String, String> privateIps){
+        store.put(room, privateIps);
+    }
+
+    public Map<String, String > get(String room){
+        Map<String, String> privateIps = store.getIfPresent(room);
+        if (privateIps == null){
+            throw new IllegalStateException("방에 대한 내부 아이피 정보가 없음"); //main-api 서버 시작된지 얼마 안됐을 때 or 잘못된 room을 넘겼을 때
+        }
+        if (privateIps.size() != ssidConfig.getSsids(room).size()){
+            throw new IllegalStateException(room + "의 내부 아이피가 올바르지 않은 상태"); //해당 방의 와이파이가 잘 연결됐는지 확인해봐야 함
+        }
+        return privateIps;
+    }
+}
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringApplicationEventBus.java b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringApplicationEventBus.java
similarity index 92%
rename from modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringApplicationEventBus.java
rename to modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringApplicationEventBus.java
index 4b4daabb..da0191a0 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringApplicationEventBus.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringApplicationEventBus.java
@@ -1,4 +1,4 @@
-package com.whoz_in.main_api.shared.domain;
+package com.whoz_in.main_api.shared.infrastructure.domain;
 
 import com.whoz_in.domain.shared.event.DomainEvent;
 import com.whoz_in.domain.shared.event.EventBus;
diff --git a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringSecurityPasswordEncoder.java b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringSecurityPasswordEncoder.java
similarity index 91%
rename from modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringSecurityPasswordEncoder.java
rename to modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringSecurityPasswordEncoder.java
index 4117efa1..47e7c450 100644
--- a/modules/main-api/src/main/java/com/whoz_in/main_api/shared/domain/SpringSecurityPasswordEncoder.java
+++ b/modules/main-api/src/main/java/com/whoz_in/main_api/shared/infrastructure/domain/SpringSecurityPasswordEncoder.java
@@ -1,4 +1,4 @@
-package com.whoz_in.main_api.shared.domain;
+package com.whoz_in.main_api.shared.infrastructure.domain;
 
 import com.whoz_in.domain.member.service.PasswordEncoder;
 import lombok.RequiredArgsConstructor;
diff --git a/modules/main-api/src/main/resources/application-main-api.yml b/modules/main-api/src/main/resources/application-main-api.yml
index 6e8d4833..176c86d9 100644
--- a/modules/main-api/src/main/resources/application-main-api.yml
+++ b/modules/main-api/src/main/resources/application-main-api.yml
@@ -17,7 +17,9 @@ logging:
 frontend:
   base-url: ${FRONTEND_URL}
 
-https-enabled: ${HTTPS-ENABLED}
+api-key: ${API_KEY}
+
+https-enabled: ${HTTPS_ENABLED}
 
 oauth:
   redirectUri: ${OAUTH_REDIRECT_URL}
diff --git a/modules/main-api/src/test/java/com/whoz_in/main_api/shared/RequesterInfoTest.java b/modules/main-api/src/test/java/com/whoz_in/main_api/shared/RequesterInfoTest.java
index 86487b9c..567d6fec 100644
--- a/modules/main-api/src/test/java/com/whoz_in/main_api/shared/RequesterInfoTest.java
+++ b/modules/main-api/src/test/java/com/whoz_in/main_api/shared/RequesterInfoTest.java
@@ -2,7 +2,7 @@
 
 import com.whoz_in.domain.member.model.MemberId;
 import com.whoz_in.main_api.config.security.JwtAuthentication;
-import com.whoz_in.main_api.shared.utils.SpringSecurityRequesterInfo;
+import com.whoz_in.main_api.config.security.SpringSecurityRequesterInfo;
 import java.util.Collections;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
diff --git a/modules/master-api/src/main/java/com/whoz_in/master_api/private_ip/MainApiHandlerPrivateIpWriter.java b/modules/master-api/src/main/java/com/whoz_in/master_api/private_ip/MainApiHandlerPrivateIpWriter.java
new file mode 100644
index 00000000..75d3ac1b
--- /dev/null
+++ b/modules/master-api/src/main/java/com/whoz_in/master_api/private_ip/MainApiHandlerPrivateIpWriter.java
@@ -0,0 +1,22 @@
+package com.whoz_in.master_api.private_ip;
+
+import com.whoz_in.main_api.command.private_ip.PrivateIpUpdate;
+import com.whoz_in.main_api.command.private_ip.PrivateIpUpdateHandler;
+import com.whoz_in.network_api.private_ip.PrivateIpWriter;
+import java.util.Map;
+import lombok.RequiredArgsConstructor;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+//main-api의 핸들러를 직접 호출하여 내부 아이피를 최신화함
+@Primary
+@Component
+@RequiredArgsConstructor
+public class MainApiHandlerPrivateIpWriter implements PrivateIpWriter {
+    private final PrivateIpUpdateHandler privateIpUpdateHandler;
+    @Override
+    public boolean write(String room, Map<String, String> privateIps) {
+        privateIpUpdateHandler.handle(new PrivateIpUpdate(room, privateIps));
+        return true;
+    }
+}
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/common/StubNetworkInterfaces.java b/modules/network-api/src/main/java/com/whoz_in/network_api/common/StubNetworkInterfaces.java
index b1fe6cbf..3c376f6b 100644
--- a/modules/network-api/src/main/java/com/whoz_in/network_api/common/StubNetworkInterfaces.java
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/common/StubNetworkInterfaces.java
@@ -19,6 +19,6 @@ public final class StubNetworkInterfaces implements SystemNetworkInterfaces{
 
     @Override
     public List<NetworkInterface> getLatest() {
-        return networkConfig.getNetworkInterfaces();
+        return networkConfig.getAllNIs();
     }
 }
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/config/NetworkConfig.java b/modules/network-api/src/main/java/com/whoz_in/network_api/config/NetworkConfig.java
index 6fdfbc05..b97e6f57 100644
--- a/modules/network-api/src/main/java/com/whoz_in/network_api/config/NetworkConfig.java
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/config/NetworkConfig.java
@@ -14,7 +14,8 @@
 public class NetworkConfig {
     private final String room;
     private final String sudoPassword;
-    private final List<NetworkInterface> networkInterfaces;
+    private final List<NetworkInterface> allNIs;
+    private final List<NetworkInterface> managedNIs;
     private final NetworkInterface monitorNI;
     private final List<NetworkInterface> mdnsNIs;
     private final List<NetworkInterface> arpNIs;
@@ -45,7 +46,10 @@ public NetworkConfig(
                             generateCommand(arpCommandTemplate, arp.interfaceName()));
                 })
                 .toList();
-        this.networkInterfaces = Stream.of(monitorNI, mdnsNIs, arpNIs)
+        this.managedNIs = Stream.of(mdnsNIs, arpNIs)
+                .flatMap(Collection::stream)
+                .toList();
+        this.allNIs = Stream.of(monitorNI, this.managedNIs)
                 .flatMap(list -> list instanceof Collection<?> ?
                         ((Collection<NetworkInterface>) list).stream() : Stream.of((NetworkInterface) list))
                 .toList();
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/config/RestTemplateConfig.java b/modules/network-api/src/main/java/com/whoz_in/network_api/config/RestTemplateConfig.java
new file mode 100644
index 00000000..e999cd28
--- /dev/null
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/config/RestTemplateConfig.java
@@ -0,0 +1,14 @@
+package com.whoz_in.network_api.config;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.client.RestTemplate;
+
+@Configuration
+public class RestTemplateConfig {
+
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+}
\ No newline at end of file
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/HttpPrivateIpWriter.java b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/HttpPrivateIpWriter.java
new file mode 100644
index 00000000..9a82c0fa
--- /dev/null
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/HttpPrivateIpWriter.java
@@ -0,0 +1,72 @@
+package com.whoz_in.network_api.private_ip;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import java.util.Map;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.http.HttpEntity;
+import org.springframework.http.HttpHeaders;
+import org.springframework.http.HttpMethod;
+import org.springframework.stereotype.Component;
+import org.springframework.web.client.HttpClientErrorException;
+import org.springframework.web.client.ResourceAccessException;
+import org.springframework.web.client.RestTemplate;
+
+//http로 알리도록 구현
+@Slf4j
+@Component
+public final class HttpPrivateIpWriter implements PrivateIpWriter {
+    private final RestTemplate restTemplate;
+    private final ObjectMapper objectMapper;
+    private final String mainApiBaseUrl;
+    private final String mainApiKey;
+
+    public HttpPrivateIpWriter(RestTemplate restTemplate, ObjectMapper objectMapper,
+            @Value("${main-api.base-url}") String mainApiBaseUrl,
+            @Value("${main-api.api-key}") String mainApiKey) {
+        this.restTemplate = restTemplate;
+        this.objectMapper = objectMapper;
+        this.mainApiBaseUrl = mainApiBaseUrl;
+        this.mainApiKey = mainApiKey;
+    }
+
+    //TODO: 다른 요청도 하게 되면 공통 로직 묶기
+    @Override
+    public boolean write(String room, Map<String, String> privateIps) {
+
+        HttpHeaders headers = new HttpHeaders();
+        headers.set("Authorization", mainApiKey);
+        headers.set("Content-Type", "application/json");
+
+        HttpEntity<String> requestEntity = new HttpEntity<>(createRequestBody(room, privateIps), headers);
+
+        try {
+            restTemplate.exchange(
+                    mainApiBaseUrl + "/api/v1/private-ip",
+                    HttpMethod.PUT,
+                    requestEntity,
+                    Void.class
+            );
+            return true;
+        } catch (ResourceAccessException e){
+            log.error("main api에 접근할 수 없음 : {}", e.getMessage()); //서버가 꺼져있는지 확인
+        } catch (HttpClientErrorException.Forbidden e) {
+            log.error("Api key 인증 실패 : {}", e.getMessage());
+        } catch (Exception e) {
+            log.error("알 수 없는 예외 : {}", e.getMessage());
+        }
+        return false;
+    }
+
+    private String createRequestBody(String room, Map<String, String> privateIps) {
+        try {
+            return objectMapper.writeValueAsString(Map.of(
+                    "room", room,
+                    "private_ip_list", privateIps
+            ));
+        } catch (JsonProcessingException e) {
+            throw new RuntimeException("Failed to serialize request body", e);
+        }
+    }
+}
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpUpdater.java b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpUpdater.java
new file mode 100644
index 00000000..fa376a93
--- /dev/null
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpUpdater.java
@@ -0,0 +1,43 @@
+package com.whoz_in.network_api.private_ip;
+
+import com.whoz_in.network_api.common.NetworkInterface;
+import com.whoz_in.network_api.config.NetworkConfig;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+//주기적으로 자신의 내부 아이피를 알아내고 PrivateIpWriter를 이용하여 main-api에 저장
+@Slf4j
+@Component
+@RequiredArgsConstructor
+public class PrivateIpUpdater {
+    private Map<String, String> sent = Map.of();
+    private final NetworkConfig networkConfig;
+    private final PrivateIpWriter writer;
+
+    @Scheduled(fixedRate = 30000)
+    private void update() {
+        Map<String, String> privateIp = getPrivateIpPerSsid();
+        if (sent.equals(privateIp))
+            return;
+        if (writer.write(networkConfig.getRoom(), privateIp)) {
+            sent = privateIp;
+            log.info("[private ip] updated");
+        }
+    }
+
+    private Map<String, String> getPrivateIpPerSsid(){
+        List<NetworkInterface> networkInterfaces = networkConfig.getManagedNIs();
+        //아이피를 얻지 못했을 경우 담지 않는다.
+        Map<String, String> privateIps = new HashMap<>();
+        for (NetworkInterface ni : networkInterfaces) {
+            SystemPrivateIpResolver.getIPv4(ni.getInterfaceName())
+                    .ifPresent(ip->privateIps.put(ni.getAltSsid(), ip));
+        }
+        return privateIps;
+    }
+}
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpWriter.java b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpWriter.java
new file mode 100644
index 00000000..85de5144
--- /dev/null
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/PrivateIpWriter.java
@@ -0,0 +1,9 @@
+package com.whoz_in.network_api.private_ip;
+
+import java.util.Map;
+
+//main-api에게 자신(network-api)이 가진 내부 아이피를 알리는 기능
+public interface PrivateIpWriter {
+    //반환 값은 성공 여부를 나타낸다.
+    boolean write(String room, Map<String, String> privateIps); //Map<방, Optional<아이피>>
+}
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/SystemPrivateIpResolver.java b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/SystemPrivateIpResolver.java
new file mode 100644
index 00000000..f9ab1072
--- /dev/null
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/private_ip/SystemPrivateIpResolver.java
@@ -0,0 +1,25 @@
+package com.whoz_in.network_api.private_ip;
+
+import java.net.InetAddress;
+import java.net.SocketException;
+import java.util.Collections;
+import java.util.Optional;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+//내부 아이피를 알아내는 클래스
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public final class SystemPrivateIpResolver {
+    public static Optional<String> getIPv4(String interfaceName) {
+        try {
+            return Collections.list(java.net.NetworkInterface.getNetworkInterfaces()).stream()
+                    .filter(networkInterface -> networkInterface.getName().equals(interfaceName))
+                    .flatMap(networkInterface -> Collections.list(networkInterface.getInetAddresses()).stream())
+                    .filter(address -> !address.isLoopbackAddress() && address instanceof java.net.Inet4Address)
+                    .map(InetAddress::getHostAddress)
+                    .findAny();
+        } catch (SocketException e) {
+            throw new IllegalStateException("시스템에 네트워크 인터페이스가 아예 존재하지 않음");
+        }
+    }
+}
diff --git a/modules/network-api/src/main/java/com/whoz_in/network_api/system_validator/SystemValidator.java b/modules/network-api/src/main/java/com/whoz_in/network_api/system_validator/SystemValidator.java
index edf07bb4..9fb6d9e5 100644
--- a/modules/network-api/src/main/java/com/whoz_in/network_api/system_validator/SystemValidator.java
+++ b/modules/network-api/src/main/java/com/whoz_in/network_api/system_validator/SystemValidator.java
@@ -40,7 +40,7 @@ public SystemValidator(
 
         //네트워크 인터페이스 정보
         List<NetworkInterface> system = systemNIs.getLatest();
-        List<NetworkInterface> setting = config.getNetworkInterfaces();
+        List<NetworkInterface> setting = config.getAllNIs();
 
         //네트워크 인터페이스 출력
         log.info("\n시스템 네트워크 인터페이스 - \n{}\n설정된 네트워크 인터페이스 - \n{}",
@@ -64,7 +64,7 @@ private void checkRegularly() {
         log.info("시스템 검증 시작..");
         //네트워크 인터페이스 상태 검증
         ValidationResult result = networkInterfaceValidator.getValidationResult(
-                systemNIs.getLatest(), config.getNetworkInterfaces());
+                systemNIs.getLatest(), config.getAllNIs());
         //더 많은 검증하면 result에 추가하기..
 
         if (result.hasErrors()) {
diff --git a/modules/network-api/src/main/resources/application-network-api.yml b/modules/network-api/src/main/resources/application-network-api.yml
index 0d3496f7..d561be38 100644
--- a/modules/network-api/src/main/resources/application-network-api.yml
+++ b/modules/network-api/src/main/resources/application-network-api.yml
@@ -18,5 +18,9 @@ command:
 
 sudo_password: ${SUDO_PASSWORD}
 
+main-api:
+  base-url: ${MAIN_API_BASE_URL}
+  api-key: ${MAIN_API_API_KEY}
+
 logging:
   config: "classpath:logback-common.xml"
\ No newline at end of file