diff --git a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCase.kt b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCase.kt
index 957ce293..af53bf70 100644
--- a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCase.kt
+++ b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCase.kt
@@ -13,7 +13,7 @@ import team.comit.simtong.global.annotation.UseCase
  * @author Chokyunghyeon
  * @author kimbeomjin
  * @date 2022/09/24
- * @version 1.0.0
+ * @version 1.2.5
  **/
 @UseCase
 class CheckAuthCodeUseCase(
@@ -22,9 +22,10 @@ class CheckAuthCodeUseCase(
 ) {
 
     fun execute(email: String, code: String) {
-        val authCode = queryAuthCodePort.queryAuthCodeByEmail(email) ?: throw AuthExceptions.RequiredNewEmailAuthentication()
+        val authCode = queryAuthCodePort.queryAuthCodeByEmail(email)
+            ?: throw AuthExceptions.RequiredNewEmailAuthentication()
 
-        if (authCode.code != code) {
+        if (!authCode.code.match(code)) {
             throw AuthExceptions.DifferentAuthCode()
         }
 
@@ -32,5 +33,4 @@ class CheckAuthCodeUseCase(
             AuthCodeLimit.certified(email)
         )
     }
-
 }
\ No newline at end of file
diff --git a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/ReissueTokenUseCase.kt b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/ReissueTokenUseCase.kt
index c66f9c65..096af534 100644
--- a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/ReissueTokenUseCase.kt
+++ b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/ReissueTokenUseCase.kt
@@ -13,7 +13,7 @@ import team.comit.simtong.global.annotation.UseCase
  * @author Chokyunghyeon
  * @author kimbeomjin
  * @date 2022/09/18
- * @version 1.0.0
+ * @version 1.2.5
  **/
 @UseCase
 class ReissueTokenUseCase(
@@ -21,13 +21,13 @@ class ReissueTokenUseCase(
     private val queryRefreshTokenPort: QueryRefreshTokenPort
 ) {
 
-    fun execute(request: String): TokenResponse {
-        val token = queryRefreshTokenPort.queryRefreshTokenByToken(request)
+    fun execute(token: String): TokenResponse {
+        val refreshToken = queryRefreshTokenPort.queryRefreshTokenByToken(token)
             ?: throw AuthExceptions.RefreshTokenNotFound()
 
         return jwtPort.receiveToken(
-            userId = token.userId,
-            authority = token.authority
+            userId = refreshToken.userId,
+            authority = refreshToken.authority
         )
     }
 }
\ No newline at end of file
diff --git a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCase.kt b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCase.kt
index 3373244b..8820da58 100644
--- a/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCase.kt
+++ b/simtong-application/src/main/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCase.kt
@@ -1,6 +1,5 @@
 package team.comit.simtong.domain.auth.usecase
 
-import team.comit.simtong.domain.auth.exception.AuthExceptions
 import team.comit.simtong.domain.auth.model.AuthCode
 import team.comit.simtong.domain.auth.model.AuthCodeLimit
 import team.comit.simtong.domain.auth.spi.CommandAuthCodeLimitPort
@@ -15,7 +14,7 @@ import team.comit.simtong.global.annotation.UseCase
  *
  * @author Chokyunghyeon
  * @date 2022/09/24
- * @version 1.0.0
+ * @version 1.2.5
  **/
 @UseCase
 class SendAuthCodeUseCase(
@@ -27,17 +26,16 @@ class SendAuthCodeUseCase(
 
     fun execute(email: String) {
         val authCodeLimit = queryAuthCodeLimitPort.queryAuthCodeLimitByEmail(email)
-            ?: AuthCodeLimit(email)
+            ?: AuthCodeLimit.issue(email)
 
-        if (authCodeLimit.verified) {
-            throw AuthExceptions.AlreadyCertifiedEmail()
-        }
+        commandAuthCodeLimitPort.save(
+            authCodeLimit.increaseCount()
+        )
 
-        commandAuthCodeLimitPort.save(authCodeLimit.increaseCount())
+        val authCode = commandAuthCodePort.save(
+            AuthCode.issue(email)
+        )
 
-        val authCode = commandAuthCodePort.save(AuthCode(email))
-
-        sendEmailPort.sendAuthCode(authCode.code, email)
+        sendEmailPort.sendAuthCode(authCode.code.value, email)
     }
-
 }
\ No newline at end of file
diff --git a/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCaseTests.kt b/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCaseTests.kt
index 98f30b0b..5d16429f 100644
--- a/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCaseTests.kt
+++ b/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/CheckAuthCodeUseCaseTests.kt
@@ -8,6 +8,7 @@ import org.mockito.BDDMockito.given
 import org.springframework.boot.test.mock.mockito.MockBean
 import team.comit.simtong.domain.auth.exception.AuthExceptions
 import team.comit.simtong.domain.auth.model.AuthCode
+import team.comit.simtong.domain.auth.model.Code
 import team.comit.simtong.domain.auth.spi.CommandAuthCodeLimitPort
 import team.comit.simtong.domain.auth.spi.QueryAuthCodePort
 import team.comit.simtong.global.annotation.SimtongTest
@@ -30,7 +31,7 @@ class CheckAuthCodeUseCaseTests {
     private val authCodeStub: AuthCode by lazy {
         AuthCode(
             key = email,
-            code = code,
+            code = Code.of(code),
             expirationTime = AuthCode.EXPIRED
         )
     }
@@ -38,7 +39,7 @@ class CheckAuthCodeUseCaseTests {
     private val differentAuthCodeStub by lazy {
         AuthCode(
             key = email,
-            code = "654321",
+            code = Code.of("654321"),
             expirationTime = AuthCode.EXPIRED
         )
     }
diff --git a/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCaseTests.kt b/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCaseTests.kt
index 084affcb..627a33ee 100644
--- a/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCaseTests.kt
+++ b/simtong-application/src/test/kotlin/team/comit/simtong/domain/auth/usecase/SendAuthCodeUseCaseTests.kt
@@ -11,6 +11,7 @@ import org.springframework.boot.test.mock.mockito.MockBean
 import team.comit.simtong.domain.auth.exception.AuthExceptions
 import team.comit.simtong.domain.auth.model.AuthCode
 import team.comit.simtong.domain.auth.model.AuthCodeLimit
+import team.comit.simtong.domain.auth.model.Code
 import team.comit.simtong.domain.auth.spi.CommandAuthCodeLimitPort
 import team.comit.simtong.domain.auth.spi.CommandAuthCodePort
 import team.comit.simtong.domain.auth.spi.QueryAuthCodeLimitPort
@@ -59,7 +60,7 @@ class SendAuthCodeUseCaseTests {
     private val authCodeStub by lazy {
         AuthCode(
             key = email,
-            code = code,
+            code = Code.of(code),
             expirationTime = AuthCode.EXPIRED
         )
     }
diff --git a/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ChangeEmailUseCaseTests.kt b/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ChangeEmailUseCaseTests.kt
index 40b28719..ff807f13 100644
--- a/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ChangeEmailUseCaseTests.kt
+++ b/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ChangeEmailUseCaseTests.kt
@@ -51,7 +51,7 @@ class ChangeEmailUseCaseTests {
     }
 
     private val uncertifiedAuthCodeLimit: AuthCodeLimit by lazy {
-        AuthCodeLimit(
+        AuthCodeLimit.issue(
             email = "test@test.com"
         )
     }
diff --git a/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ResetPasswordUseCaseTests.kt b/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ResetPasswordUseCaseTests.kt
index 90ccf977..82fd6cc0 100644
--- a/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ResetPasswordUseCaseTests.kt
+++ b/simtong-application/src/test/kotlin/team/comit/simtong/domain/user/usecase/ResetPasswordUseCaseTests.kt
@@ -57,7 +57,7 @@ class ResetPasswordUseCaseTests {
     }
 
     private val uncertifiedAuthCodeLimit: AuthCodeLimit by lazy {
-        AuthCodeLimit(
+        AuthCodeLimit.issue(
             email = email
         )
     }
diff --git a/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCode.kt b/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCode.kt
index 35d17e28..9dd5a10d 100644
--- a/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCode.kt
+++ b/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCode.kt
@@ -4,34 +4,63 @@ import net.bytebuddy.utility.RandomString
 import team.comit.simtong.global.DomainProperties.getProperty
 import team.comit.simtong.global.DomainPropertiesPrefix
 import team.comit.simtong.global.annotation.Aggregate
-import team.comit.simtong.global.annotation.Default
 
 /**
  *
- * AuthCodeAggregate Root를 담당하는 AuthCode
+ * AuthCode Aggregate Root를 담당하는 AuthCode
  *
  * @author Chokyunghyeon
+ * @author kimbeomjin
  * @date 2022/09/24
- * @version 1.0.0
+ * @version 1.2.5
  **/
 @Aggregate
-data class AuthCode @Default constructor(
+data class AuthCode(
     val key: String,
 
-    val code: String,
+    val code: Code,
 
     val expirationTime: Int
 ) {
 
-    constructor(email: String) : this(
-        key = email,
-        code = RandomString(6).nextString(),
-        expirationTime = EXPIRED
-    )
-
     companion object {
         @JvmField
         val EXPIRED = getProperty(DomainPropertiesPrefix.AUTHCODE_EXP).toInt()
+
+        fun of(key: String, code: Code, expirationTime: Int) = AuthCode(
+            key = key,
+            code = code,
+            expirationTime = expirationTime
+        )
+
+        fun issue(email: String) = AuthCode(
+            key = email,
+            code = Code.defaultValue(),
+            expirationTime = EXPIRED
+        )
+    }
+}
+
+/**
+ *
+ * AuthCode Aggregate 중 인증코드를 담당하는 Code
+ *
+ * @author kimbeomjin
+ * @date 2023/01/09
+ * @version 1.2.5
+ **/
+@JvmInline
+value class Code private constructor(
+    val value: String
+) {
+
+    fun match(code: String): Boolean {
+        return this.value == code
     }
 
+    companion object {
+        fun of(value: String) = Code(value)
+
+        fun defaultValue() = Code(RandomString(6).nextString())
+    }
 }
\ No newline at end of file
diff --git a/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCodeLimit.kt b/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCodeLimit.kt
index 8f50c4e3..4a6a172c 100644
--- a/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCodeLimit.kt
+++ b/simtong-domain/src/main/kotlin/team/comit/simtong/domain/auth/model/AuthCodeLimit.kt
@@ -4,7 +4,6 @@ import team.comit.simtong.domain.auth.exception.AuthExceptions
 import team.comit.simtong.global.DomainProperties.getProperty
 import team.comit.simtong.global.DomainPropertiesPrefix
 import team.comit.simtong.global.annotation.Aggregate
-import team.comit.simtong.global.annotation.Default
 
 /**
  *
@@ -13,10 +12,10 @@ import team.comit.simtong.global.annotation.Default
  * @author Chokyunghyeon
  * @author kimbeomjin
  * @date 2022/09/11
- * @version 1.0.0
+ * @version 1.2.5
  **/
 @Aggregate
-data class AuthCodeLimit @Default constructor(
+data class AuthCodeLimit(
     val key: String,
 
     val expirationTime: Int,
@@ -25,14 +24,6 @@ data class AuthCodeLimit @Default constructor(
 
     val verified: Boolean
 ) {
-
-    constructor(email: String) : this(
-        key = email,
-        expirationTime = EXPIRED,
-        attemptCount = 0,
-        verified = false
-    )
-
     companion object {
         @JvmField
         val MAX_ATTEMPT_COUNT: Short = getProperty(DomainPropertiesPrefix.AUTHCODELIMIT_MAX_ATTEMPT_COUNT).toShort()
@@ -43,6 +34,13 @@ data class AuthCodeLimit @Default constructor(
         @JvmField
         val VERIFIED_EXPIRED: Int = getProperty(DomainPropertiesPrefix.AUTHCODELIMIT_VERIFIED_EXP).toInt()
 
+        fun issue(email: String) = AuthCodeLimit(
+            key = email,
+            expirationTime = EXPIRED,
+            attemptCount = 0,
+            verified = false
+        )
+
         fun certified(email: String) = AuthCodeLimit(
             key = email,
             expirationTime = VERIFIED_EXPIRED,
@@ -52,9 +50,8 @@ data class AuthCodeLimit @Default constructor(
     }
 
     fun increaseCount(): AuthCodeLimit {
-        if (attemptCount >= MAX_ATTEMPT_COUNT) {
-            throw AuthExceptions.ExceededSendAuthCodeRequest()
-        }
+        checkNotYetVerified()
+        checkNotExceededAttemptCount()
 
         return AuthCodeLimit(
             key = key,
@@ -64,4 +61,15 @@ data class AuthCodeLimit @Default constructor(
         )
     }
 
+    private fun checkNotYetVerified() {
+        if (verified) {
+            throw AuthExceptions.AlreadyCertifiedEmail()
+        }
+    }
+
+    private fun checkNotExceededAttemptCount() {
+        if (attemptCount >= MAX_ATTEMPT_COUNT) {
+            throw AuthExceptions.ExceededSendAuthCodeRequest()
+        }
+    }
 }
\ No newline at end of file
diff --git a/simtong-infrastructure/src/main/kotlin/team/comit/simtong/persistence/auth/mapper/AuthCodeMapper.kt b/simtong-infrastructure/src/main/kotlin/team/comit/simtong/persistence/auth/mapper/AuthCodeMapper.kt
index 48ceae6d..dbdc8e8f 100644
--- a/simtong-infrastructure/src/main/kotlin/team/comit/simtong/persistence/auth/mapper/AuthCodeMapper.kt
+++ b/simtong-infrastructure/src/main/kotlin/team/comit/simtong/persistence/auth/mapper/AuthCodeMapper.kt
@@ -1,7 +1,8 @@
 package team.comit.simtong.persistence.auth.mapper
 
-import org.mapstruct.Mapper
+import org.springframework.stereotype.Component
 import team.comit.simtong.domain.auth.model.AuthCode
+import team.comit.simtong.domain.auth.model.Code
 import team.comit.simtong.persistence.GenericMapper
 import team.comit.simtong.persistence.auth.entity.AuthCodeEntity
 
@@ -10,9 +11,36 @@ import team.comit.simtong.persistence.auth.entity.AuthCodeEntity
  * AuthCodeEntity와 DomainAuthCode를 변환하는 AuthCodeMapper
  *
  * @author Chokyunghyeon
+ * @author kimbeomjin
  * @date 2022/09/25
- * @version 1.0.0
+ * @version 1.2.5
  **/
-@Mapper
-abstract class AuthCodeMapper : GenericMapper<AuthCodeEntity, AuthCode> {
+@Component
+class AuthCodeMapper : GenericMapper<AuthCodeEntity, AuthCode> {
+
+    override fun toEntity(model: AuthCode): AuthCodeEntity {
+        return AuthCodeEntity(
+            key = model.key,
+            code = model.code.value,
+            expirationTime = model.expirationTime
+        )
+    }
+
+    override fun toDomain(entity: AuthCodeEntity?): AuthCode? {
+        return entity?.let {
+            AuthCode.of(
+                key = it.key,
+                code = Code.of(it.code),
+                expirationTime = it.expirationTime
+            )
+        }
+    }
+
+    override fun toDomainNotNull(entity: AuthCodeEntity): AuthCode {
+        return AuthCode.of(
+            key = entity.key,
+            code = Code.of(entity.code),
+            expirationTime = entity.expirationTime
+        )
+    }
 }
\ No newline at end of file