diff --git a/backend/.gitignore b/backend/.gitignore
index c2065bc26..be7ddef89 100644
--- a/backend/.gitignore
+++ b/backend/.gitignore
@@ -35,3 +35,7 @@ out/
 
 ### VS Code ###
 .vscode/
+
+### db-connection
+application-h2.properties
+application-mysql.properties
diff --git a/backend/build.gradle b/backend/build.gradle
index 6aecd7923..d06523464 100644
--- a/backend/build.gradle
+++ b/backend/build.gradle
@@ -26,7 +26,7 @@ dependencies {
     annotationProcessor 'org.projectlombok:lombok'
     testImplementation 'org.springframework.boot:spring-boot-starter-test'
     runtimeOnly 'mysql:mysql-connector-java'
-//    runtimeOnly 'com.h2database:h2'
+    runtimeOnly 'com.h2database:h2'
 }
 
 tasks.named('test') {
diff --git a/backend/src/main/resources/application.properties b/backend/src/main/resources/application.properties
index 97a396ecc..2b03e74b0 100644
--- a/backend/src/main/resources/application.properties
+++ b/backend/src/main/resources/application.properties
@@ -1,18 +1,5 @@
-# do not set two of datasource.
-spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
-#spring.datasource.driverClassName=org.h2.Driver
-
-# In-Memory mode
-#spring.datasource.url=jdbc:h2:mem:test;DB_CLOSE_ON_EXIT=FALSE
-#spring.datasource.username=sa
-#spring.datasource.password=
-
-# aws mysql
-spring.datasource.url=jdbc:mysql://ec2-15-165-159-189.ap-northeast-2.compute.amazonaws.com:3306/testdb?useSSL=false&useUnicode=true&allowPublicKeyRetrieval=true&serverTimezone=Asia/Seoul
-spring.datasource.username=test
-spring.datasource.password=team05
-
-#spring.h2.console.enabled=true
-#spring.h2.console.path=/h2-console
-
+# profiles: h2, mysql
+spring.profiles.active=mysql
 
+#logging - develop: debug, production: info
+logging.level.com.team05.todolist=debug