diff --git a/common/src/main/java/com/xypower/common/MicroPhotoContext.java b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
index 2f8dfbab..e440c40a 100644
--- a/common/src/main/java/com/xypower/common/MicroPhotoContext.java
+++ b/common/src/main/java/com/xypower/common/MicroPhotoContext.java
@@ -65,6 +65,7 @@ public class MicroPhotoContext {
         public int[] absHeartbeats; // second
         public int separateNetwork;
         public int mpappMonitorTimeout = 30 * 60000;    // 30 minutes
+        public int timeForKeepingLogs = 15; // Unit day
 
         public String getUrl() {
             if (TextUtils.isEmpty(server)) {
@@ -298,6 +299,8 @@ public class MicroPhotoContext {
             masterConfig.quickHbMode = jsonObject.optInt("quickHbMode", 0);
             masterConfig.usingAbsHbTime = jsonObject.optInt("usingAbsHbTime", 0);
             masterConfig.separateNetwork = jsonObject.optInt("separateNetwork", 0);
+            masterConfig.timeForKeepingLogs = jsonObject.optInt("timeForKeepingLogs", 15);
+
             // masterConfig.mpappMonitorTimeout = jsonObject.optInt("mpappMonitorTimeout", 30 * 60000);
             int mpappMonitorTimeout = jsonObject.optInt("mpappMonitorTimeout", 30 * 60000);
             if (mpappMonitorTimeout >= 4 * 60000 && mpappMonitorTimeout <= 35 * 60000) {
diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index 6b880094..4e5cde8e 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -312,6 +312,9 @@ public class MpMasterService extends Service {
         }
         mSeparateNetwork = masterConfig.separateNetwork != 0;
         mTimeOfMpAppAlive = masterConfig.mpappMonitorTimeout;
+        if (masterConfig.timeForKeepingLogs > 0) {
+            mTimeForKeepingLogs = masterConfig.timeForKeepingLogs * 86400000;
+        }
     }
 
     private void loadIccid() {