diff --git a/BE/src/app.module.ts b/BE/src/app.module.ts
index 62133d9..117631b 100644
--- a/BE/src/app.module.ts
+++ b/BE/src/app.module.ts
@@ -4,40 +4,24 @@ import { AppService } from './app.service';
 import { TypeOrmModule } from '@nestjs/typeorm';
 import { ConfigModule, ConfigService } from '@nestjs/config';
 import { StudyLogsModule } from './study-logs/study-logs.module';
-import { StudyLogs } from './study-logs/study-logs.entity';
-import { Categories } from './categories/categories.entity';
 import { CategoriesModule } from './categories/categories.module';
 import { MatesModule } from './mates/mates.module';
 import { UsersModule } from './users/users.module';
-import { UsersModel } from './users/entity/users.entity';
 import { PassportModule } from '@nestjs/passport';
 import { AuthModule } from './auth/auth.module';
 import { ServeStaticModule } from '@nestjs/serve-static';
-import { join } from 'path';
-import { Mates } from './mates/mates.entity';
-import { LoggingMiddleware } from './common/logging.middleware';
+import { LoggingMiddleware } from './common/middleware/logging.middleware';
+import { typeormConfig } from './common/config/typeorm.config';
+import { staticConfig } from './common/config/static.config';
 
 @Module({
   imports: [
-    ServeStaticModule.forRoot({
-      rootPath: join(__dirname, '../../..', 'apps'),
-      serveRoot: '/',
-      renderPath: '/',
-    }),
+    ServeStaticModule.forRoot(staticConfig),
     ConfigModule.forRoot({
       isGlobal: true,
     }),
     TypeOrmModule.forRootAsync({
-      useFactory: (config: ConfigService) => ({
-        type: 'mysql',
-        host: config.get<string>('DATABASE_HOST'),
-        port: config.get<number>('DATABASE_PORT'),
-        username: config.get<string>('DATABASE_USERNAME'),
-        password: config.get<string>('DATABASE_PASSWORD'),
-        database: config.get<string>('DATABASE_NAME'),
-        entities: [StudyLogs, Categories, UsersModel, Mates],
-        synchronize: true,
-      }),
+      useFactory: typeormConfig,
       inject: [ConfigService],
     }),
     StudyLogsModule,
diff --git a/BE/src/auth/auth.controller.ts b/BE/src/auth/auth.controller.ts
index 1d026cb..00caead 100644
--- a/BE/src/auth/auth.controller.ts
+++ b/BE/src/auth/auth.controller.ts
@@ -29,7 +29,7 @@ import { UpdateUserDto } from 'src/users/dto/update-user.dto';
 import { FileInterceptor } from '@nestjs/platform-express';
 import { ConfigService } from '@nestjs/config';
 import { ENV } from 'src/common/const/env-keys.const';
-import { getImageUrl } from 'src/common/utils';
+import { getImageUrl } from 'src/common/utils/utils';
 
 @ApiTags('로그인 페이지')
 @Controller('auth')
diff --git a/BE/src/auth/auth.module.ts b/BE/src/auth/auth.module.ts
index f362504..d5a8c0e 100644
--- a/BE/src/auth/auth.module.ts
+++ b/BE/src/auth/auth.module.ts
@@ -6,17 +6,15 @@ import { UsersModule } from 'src/users/users.module';
 import { JwtModule } from '@nestjs/jwt';
 import { GoogleStrategy } from './google.strategy';
 import { MulterModule } from '@nestjs/platform-express';
-import { multerConfig } from 'src/common/multer.config';
+import { multerConfig } from 'src/common/config/multer.config';
+import { jwtConfig } from 'src/common/config/jwt.config';
 
 @Module({
   imports: [
     JwtModule.registerAsync({
       imports: [ConfigModule],
       inject: [ConfigService],
-      useFactory: async (configService: ConfigService) => ({
-        secret: configService.get('JWT_SECRET'),
-        signOptions: { expiresIn: configService.get('JWT_EXPIRES_IN') },
-      }),
+      useFactory: jwtConfig,
     }),
     MulterModule.registerAsync({
       imports: [ConfigModule],
diff --git a/BE/src/common/config/jwt.config.ts b/BE/src/common/config/jwt.config.ts
new file mode 100644
index 0000000..0e666a1
--- /dev/null
+++ b/BE/src/common/config/jwt.config.ts
@@ -0,0 +1,7 @@
+import { ConfigService } from '@nestjs/config';
+import { ENV } from '../const/env-keys.const';
+
+export const jwtConfig = (configService: ConfigService) => ({
+  secret: configService.get<string>(ENV.JWT_SECRET),
+  signOptions: { expiresIn: configService.get<number>(ENV.JWT_EXPIRES_IN) },
+});
diff --git a/BE/src/common/logging.config.ts b/BE/src/common/config/logging.config.ts
similarity index 96%
rename from BE/src/common/logging.config.ts
rename to BE/src/common/config/logging.config.ts
index 01e8581..3dce542 100644
--- a/BE/src/common/logging.config.ts
+++ b/BE/src/common/config/logging.config.ts
@@ -1,4 +1,4 @@
-import  winston from 'winston';
+import winston from 'winston';
 
 const customFormat = winston.format.printf(
   ({ level, message, timestamp, context }) => {
diff --git a/BE/src/common/multer.config.ts b/BE/src/common/config/multer.config.ts
similarity index 92%
rename from BE/src/common/multer.config.ts
rename to BE/src/common/config/multer.config.ts
index 5d43740..d360e5b 100644
--- a/BE/src/common/multer.config.ts
+++ b/BE/src/common/config/multer.config.ts
@@ -1,7 +1,7 @@
-import  path from 'path';
+import path from 'path';
 import { BadRequestException } from '@nestjs/common';
 import { MulterOptions } from '@nestjs/platform-express/multer/interfaces/multer-options.interface';
-import  multer from 'multer';
+import multer from 'multer';
 
 export const multerConfig = (): MulterOptions => {
   const storage = multer.memoryStorage();
@@ -15,7 +15,6 @@ export const multerConfig = (): MulterOptions => {
     }
     return callback(null, true);
   };
-
   const limits = { fileSize: 1024 * 1024 * 10 }; //10MB
 
   return {
diff --git a/BE/src/common/config/static.config.ts b/BE/src/common/config/static.config.ts
new file mode 100644
index 0000000..091789e
--- /dev/null
+++ b/BE/src/common/config/static.config.ts
@@ -0,0 +1,7 @@
+import path from 'path';
+
+export const staticConfig = {
+  rootPath: path.join(__dirname, '../../../../..', 'apps'),
+  serveRoot: '/',
+  renderPath: '/',
+};
diff --git a/BE/src/common/config/swagger.config.ts b/BE/src/common/config/swagger.config.ts
new file mode 100644
index 0000000..36a79fc
--- /dev/null
+++ b/BE/src/common/config/swagger.config.ts
@@ -0,0 +1,8 @@
+import { DocumentBuilder } from '@nestjs/swagger';
+
+export const swaggerConfig = new DocumentBuilder()
+  .setTitle('StudyLog API')
+  .setDescription('StudyLog 애플리케이션 API 문서')
+  .setVersion('2.0')
+  .addBearerAuth()
+  .build();
diff --git a/BE/src/common/config/typeorm.config.ts b/BE/src/common/config/typeorm.config.ts
new file mode 100644
index 0000000..6813447
--- /dev/null
+++ b/BE/src/common/config/typeorm.config.ts
@@ -0,0 +1,19 @@
+import { ConfigService } from '@nestjs/config';
+import { TypeOrmModuleOptions } from '@nestjs/typeorm';
+import { Categories } from 'src/categories/categories.entity';
+import { Mates } from 'src/mates/mates.entity';
+import { StudyLogs } from 'src/study-logs/study-logs.entity';
+import { UsersModel } from 'src/users/entity/users.entity';
+import { ENV } from '../const/env-keys.const';
+
+export const typeormConfig = (config: ConfigService): TypeOrmModuleOptions => ({
+  type: 'mysql',
+  host: config.get<string>(ENV.DATABASE_HOST),
+  port: config.get<number>(ENV.DATABASE_PORT),
+  username: config.get<string>(ENV.DATABASE_USERNAME),
+  password: config.get<string>(ENV.DATABASE_PASSWORD),
+  database: config.get<string>(ENV.DATABASE_NAME),
+  entities: [StudyLogs, Categories, UsersModel, Mates],
+  timezone: 'Z',
+  synchronize: true,
+});
diff --git a/BE/src/common/const/env-keys.const.ts b/BE/src/common/const/env-keys.const.ts
index 771559d..f13fefb 100644
--- a/BE/src/common/const/env-keys.const.ts
+++ b/BE/src/common/const/env-keys.const.ts
@@ -5,4 +5,17 @@ export enum ENV {
   IMAGE_REGION = 'IMAGE_REGION',
   IMAGE_BUCKET = 'IMAGE_BUCKET',
   CDN_ENDPOINT = 'CDN_ENDPOINT',
+  JWT_SECRET = 'JWT_SECRET',
+  JWT_EXPIRES_IN = 'JWT_EXPIRES_IN',
+  DATABASE_HOST = 'DATABASE_HOST',
+  DATABASE_PORT = 'DATABASE_PORT',
+  DATABASE_USERNAME = 'DATABASE_USERNAME',
+  DATABASE_PASSWORD = 'DATABASE_PASSWORD',
+  DATABASE_NAME = 'DATABASE_NAME',
+  SSL = 'SSL',
+  HTTPS_KEY_PATH = 'HTTPS_KEY_PATH',
+  HTTPS_CERT_PATH = 'HTTPS_CERT_PATH',
+  PORT = 'PORT',
+  GREENEYE_URL = 'GREENEYE_URL',
+  GREENEYE_SECRET = 'GREENEYE_SECRET',
 }
diff --git a/BE/src/common/exception-filter/http-exception-filter.ts b/BE/src/common/exception-filter/http-exception-filter.ts
index 3ef1228..dd052e5 100644
--- a/BE/src/common/exception-filter/http-exception-filter.ts
+++ b/BE/src/common/exception-filter/http-exception-filter.ts
@@ -5,7 +5,7 @@ import {
   HttpException,
   Logger,
 } from '@nestjs/common';
-import { LoggingInterceptor } from '../logging.interceptor';
+import { LoggingInterceptor } from '../interceptor/logging.interceptor';
 
 @Catch(HttpException)
 export class HttpExceptionFilter implements ExceptionFilter {
diff --git a/BE/src/common/logging.interceptor.ts b/BE/src/common/interceptor/logging.interceptor.ts
similarity index 100%
rename from BE/src/common/logging.interceptor.ts
rename to BE/src/common/interceptor/logging.interceptor.ts
diff --git a/BE/src/common/logging.middleware.ts b/BE/src/common/middleware/logging.middleware.ts
similarity index 100%
rename from BE/src/common/logging.middleware.ts
rename to BE/src/common/middleware/logging.middleware.ts
diff --git a/BE/src/common/utils.ts b/BE/src/common/utils/utils.ts
similarity index 94%
rename from BE/src/common/utils.ts
rename to BE/src/common/utils/utils.ts
index 8a71a0b..4535479 100644
--- a/BE/src/common/utils.ts
+++ b/BE/src/common/utils/utils.ts
@@ -1,4 +1,4 @@
-import  path from 'path';
+import path from 'path';
 
 export function transformDate(date: Date): string {
   const year = date.getFullYear();
diff --git a/BE/src/main.ts b/BE/src/main.ts
index b43f626..6cf92fb 100644
--- a/BE/src/main.ts
+++ b/BE/src/main.ts
@@ -1,23 +1,25 @@
 import { NestFactory } from '@nestjs/core';
 import { AppModule } from './app.module';
-import { SwaggerModule, DocumentBuilder } from '@nestjs/swagger';
+import { SwaggerModule } from '@nestjs/swagger';
 import { ValidationPipe } from '@nestjs/common';
 import { ConfigService } from '@nestjs/config';
 import { readFileSync } from 'fs';
 import { WinstonModule } from 'nest-winston';
-import { loggerConfig } from './common/logging.config';
-import { LoggingInterceptor } from './common/logging.interceptor';
+import { loggerConfig } from './common/config/logging.config';
+import { LoggingInterceptor } from './common/interceptor/logging.interceptor';
 import { HttpExceptionFilter } from './common/exception-filter/http-exception-filter';
+import { swaggerConfig } from './common/config/swagger.config';
+import { ENV } from './common/const/env-keys.const';
 
 async function bootstrap() {
   const configService = new ConfigService();
 
-  const ssl = configService.get<string>('SSL');
+  const ssl = configService.get<string>(ENV.SSL);
   let httpsOptions = null;
   if (ssl == 'true') {
     httpsOptions = {
-      key: readFileSync(configService.get<string>('HTTPS_KEY_PATH')),
-      cert: readFileSync(configService.get<string>('HTTPS_CERT_PATH')),
+      key: readFileSync(configService.get<string>(ENV.HTTPS_KEY_PATH)),
+      cert: readFileSync(configService.get<string>(ENV.HTTPS_CERT_PATH)),
     };
   }
 
@@ -25,20 +27,14 @@ async function bootstrap() {
     httpsOptions,
     logger: WinstonModule.createLogger(loggerConfig),
   });
-  const config = new DocumentBuilder()
-    .setTitle('StudyLog API')
-    .setDescription('StudyLog 애플리케이션 API 문서')
-    .setVersion('2.0')
-    .addBearerAuth()
-    .build();
 
-  const document = SwaggerModule.createDocument(app, config);
+  const document = SwaggerModule.createDocument(app, swaggerConfig);
   SwaggerModule.setup('api', app, document);
 
   app.useGlobalPipes(new ValidationPipe());
   app.useGlobalInterceptors(new LoggingInterceptor());
   app.useGlobalFilters(new HttpExceptionFilter());
 
-  await app.listen(configService.get<number>('PORT') || 3000);
+  await app.listen(configService.get<number>(ENV.PORT) || 3000);
 }
 bootstrap();
diff --git a/BE/src/mates/mates.service.ts b/BE/src/mates/mates.service.ts
index d9f936e..de9aebb 100644
--- a/BE/src/mates/mates.service.ts
+++ b/BE/src/mates/mates.service.ts
@@ -9,7 +9,7 @@ import { Repository } from 'typeorm';
 import { MatesDto } from './dto/response/mates.dto';
 import { UsersModel } from 'src/users/entity/users.entity';
 import { RedisService } from 'src/common/redis.service';
-import { getImageUrl } from 'src/common/utils';
+import { getImageUrl } from 'src/common/utils/utils';
 import { ConfigService } from '@nestjs/config';
 import { ENV } from 'src/common/const/env-keys.const';
 import { StudyLogsService } from 'src/study-logs/study-logs.service';
diff --git a/BE/src/study-logs/study-logs.service.ts b/BE/src/study-logs/study-logs.service.ts
index f83c73d..6d9fa92 100644
--- a/BE/src/study-logs/study-logs.service.ts
+++ b/BE/src/study-logs/study-logs.service.ts
@@ -6,7 +6,7 @@ import { StudyLogsCreateDto } from './dto/request/create-study-logs.dto';
 import { UsersModel } from 'src/users/entity/users.entity';
 import { Categories } from 'src/categories/categories.entity';
 import { StudyLogsDto } from './dto/response/study-logs.dto';
-import { transformDate } from 'src/common/utils';
+import { transformDate } from 'src/common/utils/utils';
 import { RedisService } from 'src/common/redis.service';
 import moment from 'moment';
 
@@ -49,6 +49,7 @@ export class StudyLogsService {
   }
 
   calculateStartDay(created_at: Date, learning_time: number): Date {
+    console.log(created_at.toLocaleString());
     const STANDARD = 0;
     const standardMS = STANDARD * 60 * 60 * 1000;
     const millisecond =
diff --git a/BE/src/users/users.service.ts b/BE/src/users/users.service.ts
index f76ffec..0fa5ce3 100644
--- a/BE/src/users/users.service.ts
+++ b/BE/src/users/users.service.ts
@@ -8,7 +8,7 @@ import { GreenEyeResponse } from './interface/greeneye.interface';
 import { S3Service } from 'src/common/s3.service';
 import { ENV } from 'src/common/const/env-keys.const';
 import { UpdateUserDto } from './dto/update-user.dto';
-import { getImageUrl } from 'src/common/utils';
+import { getImageUrl } from 'src/common/utils/utils';
 
 @Injectable()
 export class UsersService {
@@ -115,8 +115,8 @@ export class UsersService {
   async requestClovaGreenEye(
     image: Express.Multer.File,
   ): Promise<GreenEyeResponse> {
-    const APIURL = this.config.get<string>('GREENEYE_URL');
-    const CLIENT_SECRET = this.config.get<string>('GREENEYE_SECRET');
+    const APIURL = this.config.get<string>(ENV.GREENEYE_URL);
+    const CLIENT_SECRET = this.config.get<string>(ENV.GREENEYE_SECRET);
     const UUID = v4();
     try {
       const response = await fetch(APIURL, {
diff --git a/BE/test/app.e2e-spec.ts b/BE/test/app.e2e-spec.ts
index 299bb5d..dbbd23b 100644
--- a/BE/test/app.e2e-spec.ts
+++ b/BE/test/app.e2e-spec.ts
@@ -1,6 +1,6 @@
 import { Test, TestingModule } from '@nestjs/testing';
 import { INestApplication } from '@nestjs/common';
-import  request from 'supertest';
+import request from 'supertest';
 import { AppModule } from '../src/app.module';
 
 describe('AppController (e2e)', () => {