diff --git a/.github/workflows/cd.yml b/.github/workflows/cd.yml
index 5571d3d..d62c52a 100644
--- a/.github/workflows/cd.yml
+++ b/.github/workflows/cd.yml
@@ -10,6 +10,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true # 서브모듈 활성화
+          token: ${{ secrets.ACTION_TOKEN }} # Private 서브모듈 접근용 토큰
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -51,23 +54,10 @@ jobs:
             --cache-from type=registry,ref=${{ secrets.DOCKERHUB_USERNAME }}/assu-app:dependency-cache \
             .
 
-      - name: Create application-secret.yml
-        run: echo "${{ secrets.APPLICATION_SECRET }}" > ./application-secret.yml
-        shell: bash
-
       - name: Create service-account.json
         run: echo "${{ secrets.SERVICE_ACCOUNT_B64 }}" | base64 -d > ./service-account.json
         shell: bash
 
-      - name: Copy application-secret.yml to EC2
-        uses: appleboy/scp-action@v0.1.3
-        with:
-          username: ubuntu
-          host: ${{ secrets.EC2_HOST }}
-          key: ${{ secrets.EC2_SSH_KEY }}
-          source: ./application-secret.yml
-          target: /home/ubuntu/secret/
-
       - name: Copy service-account.json to EC2
         uses: appleboy/scp-action@v0.1.3
         with:
@@ -107,15 +97,17 @@ jobs:
             sudo chmod +x /home/ubuntu/cicd/deploy.sh
             sudo /home/ubuntu/cicd/deploy.sh
 
+      # 테스트 서버로 복사할 파일 목록에서 application-secret.yml 제거
       - name: TEST Copy Files to Test EC2
         uses: appleboy/scp-action@v0.1.3
         with:
           host: ${{ secrets.TEST_EC2_HOST }}
           username: ubuntu
           key: ${{ secrets.TEST_EC2_SSH_KEY }}
-          source: "./application-secret.yml,./service-account.json,./docker-compose.test.yml"
+          source: "./service-account.json,./docker-compose.test.yml"
           target: "/home/ubuntu/cicd_temp/"
 
+      # 테스트 서버 폴더 정리 단계에서 application-secret.yml 이동 명령어 제거
       - name: TEST Organize Files and Directories
         uses: appleboy/ssh-action@v1.0.0
         with:
@@ -124,7 +116,6 @@ jobs:
           key: ${{ secrets.TEST_EC2_SSH_KEY }}
           script: |
             mkdir -p /home/ubuntu/secret /home/ubuntu/cicd
-            mv /home/ubuntu/cicd_temp/application-secret.yml /home/ubuntu/secret/
             mv /home/ubuntu/cicd_temp/service-account.json /home/ubuntu/secret/
             mv /home/ubuntu/cicd_temp/docker-compose.test.yml /home/ubuntu/cicd/
             rm -rf /home/ubuntu/cicd_temp
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bb76cd0..a89d854 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -14,6 +14,9 @@ jobs:
 
     steps:
       - uses: actions/checkout@v4
+        with:
+          submodules: true # 서브모듈 활성화
+          token: ${{ secrets.ACTION_TOKEN }} # Private 서브모듈 접근용 토큰
 
       - name: Set up JDK 17
         uses: actions/setup-java@v4
diff --git a/.gitignore b/.gitignore
index 4c53f8a..5433cd1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -44,6 +44,9 @@ out/
 
 ### Secret ###
 src/main/resources/application-secret.yml
+src/main/resources/application-local.yml
+src/main/resources/application-dev.yml
+src/main/resources/application-prod.yml
 
 ### Firebase ###
 src/main/resources/firebase/
diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..4463631
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "ASSU_config"]
+	path = ASSU_config
+	url = https://github.com/ASSU-dev/ASSU_config.git
diff --git a/ASSU_config b/ASSU_config
new file mode 160000
index 0000000..9c4ec10
--- /dev/null
+++ b/ASSU_config
@@ -0,0 +1 @@
+Subproject commit 9c4ec103c518f458e5109b800d21286acf23a2ef
diff --git a/build.gradle b/build.gradle
index f530fd3..5892b8b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -115,3 +115,18 @@ dependencies {
 tasks.named('test') {
 	useJUnitPlatform()
 }
+
+tasks.register('copyPrivateConfig', Copy) {
+	from './ASSU_config/local'
+	from './ASSU_config/dev'
+	from './ASSU_config/prod'
+
+	into 'src/main/resources'
+
+	exclude '.git'
+	exclude 'README.md'
+}
+
+tasks.named('processResources') {
+	dependsOn 'copyPrivateConfig'
+}
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 9b1f2ac..c1316d4 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -9,9 +9,7 @@ services:
       - "8080:8080"
     environment:
       - SPRING_PROFILES_ACTIVE=blue
-      - SPRING_CONFIG_ADDITIONAL_LOCATION=file:/app/config/
     volumes:
-      - /home/ubuntu/secret/application-secret.yml:/app/config/application-secret.yml:ro
       - /home/ubuntu/secret/service-account.json:/app/config/service-account.json:ro
     networks:
       - assu-network
@@ -26,9 +24,7 @@ services:
       - "8081:8080"
     environment:
       - SPRING_PROFILES_ACTIVE=green
-      - SPRING_CONFIG_ADDITIONAL_LOCATION=file:/app/config/
     volumes:
-      - /home/ubuntu/secret/application-secret.yml:/app/config/application-secret.yml:ro
       - /home/ubuntu/secret/service-account.json:/app/config/service-account.json:ro
     networks:
       - assu-network
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 3576302..d98b4bd 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,13 +1,28 @@
 spring:
+  application:
+    name: assu
+  profiles:
+    group:
+      "local": "local"
+      "dev": "dev"
+      "green": "green, prod"
+      "blue": "blue, prod"
+    active: local
+  thymeleaf:
+    enabled: true
+  servlet:
+    multipart:
+      max-file-size: 100MB
+      max-request-size: 100MB
   batch:
     jdbc:
       initialize-schema: never
     job:
       enabled: false
-  config:
-    import:
-      - optional:classpath:application-secret.yml
-      - optional:file:/app/config/application-secret.yml
+#  config:
+#    import:
+#      - optional:classpath:application-secret.yml
+#      - optional:file:/app/config/application-secret.yml
   jpa:
     hibernate:
       ddl-auto: update