diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
index 36c01c88..ef5c0094 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
@@ -25,7 +25,9 @@ import javax.annotation.Resource;
 import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Optional;
+import java.util.concurrent.ConcurrentHashMap;
 
 
 /**
@@ -37,6 +39,7 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
 
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+    private static final Map<String ,Boolean> deviceBackupStatus = new ConcurrentHashMap<>();
     @Resource(name = "local")
     private DeviceService deviceService;
     @Autowired
@@ -83,11 +86,18 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
                     Device primaryBase = deviceService.findByDeviceId(primaryBaseId);
                     // 如果主基站仍然在线，则跳过备选基站的数据
                     if (primaryBase != null && isBaseStationOnline(primaryBase)) {
+                        if(deviceBackupStatus.remove(deviceId) != null){
+                            logger.info("设备 {} 从备用基站 {} 切换回主基站 {}",
+                                    deviceId, id, primaryBaseId);
+                        }
                         continue;
                     }
                     else {
                         String hexPrimaryBase = String.format("%06x",Integer.parseInt(primaryBaseId));
-                        System.out.println(hexPrimaryBase);
+                        if(deviceBackupStatus.putIfAbsent(deviceId,true) == null){
+                            logger.info("设备 {} 从主基站 {} 切换到备用基站 {}",
+                                    deviceId, primaryBaseId, id);
+                        }
 
                         modifyData[5] = (byte) Integer.parseInt(hexPrimaryBase.substring(0,2),16);
                         modifyData[6] = (byte) Integer.parseInt(hexPrimaryBase.substring(2,4),16);