diff --git a/src/main/java/com/kimgo/wepush/controller/HeartbeatController.java b/src/main/java/com/kimgo/wepush/controller/HeartbeatController.java
index 05c1515..86cc75e 100644
--- a/src/main/java/com/kimgo/wepush/controller/HeartbeatController.java
+++ b/src/main/java/com/kimgo/wepush/controller/HeartbeatController.java
@@ -5,6 +5,8 @@ import com.kimgo.wepush.model.DeviceInfo;
 import com.kimgo.wepush.response.ServerResponseEntity;
 import com.kimgo.wepush.service.HeartBeatService;
 import jakarta.validation.Valid;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.RequestBody;
@@ -15,6 +17,7 @@ import org.springframework.web.bind.annotation.RestController;
 public class HeartbeatController {
     @Autowired
     private HeartBeatService heartBeatService;
+    private final Logger logger = LoggerFactory.getLogger(CallerController.class);
 
     @PostMapping("/heartbeat")
     public ServerResponseEntity receiveHeartbeat(@RequestHeader("accessToken") String accessToken,
@@ -25,6 +28,7 @@ public class HeartbeatController {
             return ServerResponseEntity.fail("accessToken cannot be empty.");
         }
         if (deviceInfo == null || deviceInfo.hasInvalidFields()){
+            logger.info("DeviceInfo: {}",deviceInfo.toString());
             return ServerResponseEntity.fail("json body value error.");
         }
         return heartBeatService.handleHeartbeatSignal(accessToken,deviceInfo);