diff --git a/services/time_manager/include/ntp_update_time.h b/services/time_manager/include/ntp_update_time.h
index 4b025fee2ae3c0b53c01dd3419bd8b041d9f0694..303e1c7c7b0f452b3d268396102869b22ecc8058 100644
--- a/services/time_manager/include/ntp_update_time.h
+++ b/services/time_manager/include/ntp_update_time.h
@@ -37,6 +37,7 @@ public:
     void SetSystemTime();
     void Stop();
     void Init();
+    int32_t MonitorNetwork();
 private:
     bool GetAutoTimeInfoFromFile(autoTimeInfo &info);
     bool SaveAutoTimeInfoToFile(autoTimeInfo &info);
diff --git a/services/time_manager/src/ntp_update_time.cpp b/services/time_manager/src/ntp_update_time.cpp
index 6febfd2b63cf52d68854c60f3d8731f5730820b7..837924d9c7d1f17313896ef31a4506e263ca3b61 100644
--- a/services/time_manager/src/ntp_update_time.cpp
+++ b/services/time_manager/src/ntp_update_time.cpp
@@ -19,6 +19,7 @@
 #include <string>
 #include <fstream>
 #include <mutex>
+#include <unistd.h>
 
 #include "ntp_trusted_time.h"
 #include "time_common.h"
@@ -66,15 +67,20 @@ void NtpUpdateTime::Init()
             return;
         }
     }
-    // observer net connection
-    NetSpecifier netSpecifier;
-    NetAllCapabilities netAllCapabilities;
-    netAllCapabilities.netCaps_.insert(NetManagerStandard::NetCap::NET_CAPABILITY_INTERNET);
-    netSpecifier.ident_ = "wifi";
-    netSpecifier.netCapabilities_ = netAllCapabilities;
-    sptr<NetSpecifier> specifier = new NetSpecifier(netSpecifier);
-    sptr<NetConnCallbackObserver> observer = new NetConnCallbackObserver;
-    DelayedSingleton<NetConnClient>::GetInstance()->RegisterNetConnCallback(specifier, observer, 0);
+
+    std::thread th = std::thread([this]() {
+    constexpr int RETRY_MAX_TIMES = 100;
+    int retryCount = 0;
+    constexpr int RETRY_TIME_INTERVAL_MILLISECOND = 1 * 1000 * 1000; // retry after 2 second
+    do {
+        if (this->MonitorNetwork() == NET_CONN_SUCCESS) {
+            break;
+        }
+    retryCount++;
+    usleep(RETRY_TIME_INTERVAL_MILLISECOND);
+    } while (retryCount < RETRY_MAX_TIMES);
+    });
+    th.detach();
 
     int32_t timerType = ITimerManager::TimerType::ELAPSED_REALTIME;
     auto callback = [this](uint64_t id) {
@@ -87,6 +93,23 @@ void NtpUpdateTime::Init()
     TimeService::GetInstance()->StartTimer(timerId_, nextTriggerTime_);
 }
 
+int32_t NtpUpdateTime::MonitorNetwork()
+{
+    // observer net connection
+    TIME_HILOGD(TIME_MODULE_SERVICE, "NtpUpdateTime::MonitorNetwork");
+    NetSpecifier netSpecifier;
+    NetAllCapabilities netAllCapabilities;
+    netAllCapabilities.netCaps_.insert(NetManagerStandard::NetCap::NET_CAPABILITY_INTERNET);
+    netSpecifier.netCapabilities_ = netAllCapabilities;
+    sptr<NetSpecifier> specifier = new NetSpecifier(netSpecifier);
+    sptr<NetConnCallbackObserver> observer = new NetConnCallbackObserver;
+    int nRet = DelayedSingleton<NetConnClient>::GetInstance()->RegisterNetConnCallback(specifier, observer, 0);
+    TIME_HILOGD(TIME_MODULE_SERVICE, "RegisterNetConnCallback retcode= %{public}d", nRet);
+
+    return nRet;
+}
+
+
 void NtpUpdateTime::SubscriberNITZTimeChangeCommonEvent()
 {
     // Broadcast subscription