diff --git a/component/remote/async.go b/component/remote/async.go
index fc11720..db198ba 100644
--- a/component/remote/async.go
+++ b/component/remote/async.go
@@ -20,6 +20,10 @@ package remote
 import (
 	"encoding/json"
 	"fmt"
+	"net/url"
+	"path"
+	"time"
+
 	"github.com/zouyx/agollo/v4/component/log"
 	"github.com/zouyx/agollo/v4/constant"
 	"github.com/zouyx/agollo/v4/env"
@@ -27,9 +31,6 @@ import (
 	"github.com/zouyx/agollo/v4/extension"
 	"github.com/zouyx/agollo/v4/protocol/http"
 	"github.com/zouyx/agollo/v4/utils"
-	"net/url"
-	"path"
-	"time"
 )
 
 const (
@@ -78,16 +79,14 @@ func (a *asyncApolloConfig) Sync(appConfigFunc func() config.AppConfig) []*confi
 	if len(remoteConfigs) == 0 || len(apolloConfigs) > 0 {
 		return apolloConfigs
 	}
-
-	appConfig.GetNotificationsMap().UpdateAllNotifications(remoteConfigs)
-
-	notifications := appConfig.GetNotificationsMap().GetNotifications()
-	n := &notifications
-	n.Range(func(key, value interface{}) bool {
-		apolloConfig := a.SyncWithNamespace(key.(string), appConfigFunc)
-		apolloConfigs = append(apolloConfigs, apolloConfig)
-		return true
-	})
+	//只是拉去有变化的配置, 并更新拉取成功的namespace的notify ID
+	for _, notifyConfig := range remoteConfigs {
+		apolloConfig := a.SyncWithNamespace(notifyConfig.NamespaceName, appConfigFunc)
+		if apolloConfig != nil {
+			appConfig.GetNotificationsMap().UpdateNotify(notifyConfig.NamespaceName, notifyConfig.NotificationID)
+			apolloConfigs = append(apolloConfigs, apolloConfig)
+		}
+	}
 	return apolloConfigs
 }
 
diff --git a/component/remote/async_test.go b/component/remote/async_test.go
index f5afe82..f5c75e4 100644
--- a/component/remote/async_test.go
+++ b/component/remote/async_test.go
@@ -19,6 +19,12 @@ package remote
 
 import (
 	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"strings"
+	"testing"
+	"time"
+
 	. "github.com/tevid/gohamcrest"
 	"github.com/zouyx/agollo/v4/cluster/roundrobin"
 	"github.com/zouyx/agollo/v4/env"
@@ -27,11 +33,6 @@ import (
 	"github.com/zouyx/agollo/v4/env/server"
 	"github.com/zouyx/agollo/v4/extension"
 	http2 "github.com/zouyx/agollo/v4/protocol/http"
-	"net/http"
-	"net/http/httptest"
-	"strings"
-	"testing"
-	"time"
 )
 
 var asyncApollo *asyncApolloConfig
@@ -72,6 +73,7 @@ const configAbc1ResponseStr = `{
 }`
 
 const responseStr = `[{"namespaceName":"application","notificationId":%d}]`
+const tworesponseStr = `[{"namespaceName":"application","notificationId":%d},{"namespaceName":"abc1","notificationId":%d}]`
 
 func onlyNormalConfigResponse(rw http.ResponseWriter, req *http.Request) {
 	rw.WriteHeader(http.StatusOK)
@@ -83,17 +85,42 @@ func onlyNormalTwoConfigResponse(rw http.ResponseWriter, req *http.Request) {
 	fmt.Fprintf(rw, configAbc1ResponseStr)
 }
 
-func onlyNormalResponse(rw http.ResponseWriter, req *http.Request) {
+func serverErrorTwoConfigResponse(rw http.ResponseWriter, req *http.Request) {
+	rw.WriteHeader(http.StatusInternalServerError)
+}
+
+func onlynormalresponse(rw http.ResponseWriter, req *http.Request) {
 	result := fmt.Sprintf(responseStr, 3)
 	fmt.Fprintf(rw, "%s", result)
 }
 
+func onlynormaltworesponse(rw http.ResponseWriter, req *http.Request) {
+	result := fmt.Sprintf(tworesponseStr, 3, 3)
+	fmt.Fprintf(rw, "%s", result)
+}
+
 func initMockNotifyAndConfigServer() *httptest.Server {
 	//clear
 	handlerMap := make(map[string]func(http.ResponseWriter, *http.Request), 1)
 	handlerMap["application"] = onlyNormalConfigResponse
 	handlerMap["abc1"] = onlyNormalTwoConfigResponse
-	return runMockConfigServer(handlerMap, onlyNormalResponse)
+	return runMockConfigServer(handlerMap, onlynormalresponse)
+}
+
+func initMockNotifyAndConfigServerWithTwo() *httptest.Server {
+	//clear
+	handlerMap := make(map[string]func(http.ResponseWriter, *http.Request), 1)
+	handlerMap["application"] = onlyNormalConfigResponse
+	handlerMap["abc1"] = onlyNormalTwoConfigResponse
+	return runMockConfigServer(handlerMap, onlynormaltworesponse)
+}
+
+func initMockNotifyAndConfigServerWithTwoErrResponse() *httptest.Server {
+	//clear
+	handlerMap := make(map[string]func(http.ResponseWriter, *http.Request), 1)
+	handlerMap["application"] = onlyNormalConfigResponse
+	handlerMap["abc1"] = serverErrorTwoConfigResponse
+	return runMockConfigServer(handlerMap, onlynormaltworesponse)
 }
 
 //run mock config server
@@ -146,7 +173,37 @@ func TestApolloConfig_Sync(t *testing.T) {
 	})
 	//err keep nil
 	Assert(t, apolloConfigs, NotNilVal())
+	Assert(t, len(apolloConfigs), Equal(1))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("application"), Equal(int64(3)))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("abc1"), Equal(int64(-1)))
+}
+
+func TestApolloConfig_SyncTwoOk(t *testing.T) {
+	server := initMockNotifyAndConfigServerWithTwo()
+	appConfig := initNotifications()
+	appConfig.IP = server.URL
+	apolloConfigs := asyncApollo.Sync(func() config.AppConfig {
+		return *appConfig
+	})
+	//err keep nil
+	Assert(t, apolloConfigs, NotNilVal())
 	Assert(t, len(apolloConfigs), Equal(2))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("application"), Equal(int64(3)))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("abc1"), Equal(int64(3)))
+}
+
+func TestApolloConfig_SyncABC1Error(t *testing.T) {
+	server := initMockNotifyAndConfigServerWithTwoErrResponse()
+	appConfig := initNotifications()
+	appConfig.IP = server.URL
+	apolloConfigs := asyncApollo.Sync(func() config.AppConfig {
+		return *appConfig
+	})
+	//err keep nil
+	Assert(t, apolloConfigs, NotNilVal())
+	Assert(t, len(apolloConfigs), Equal(1))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("application"), Equal(int64(3)))
+	Assert(t, appConfig.GetNotificationsMap().GetNotify("abc1"), Equal(int64(-1)))
 }
 
 func TestToApolloConfigError(t *testing.T) {
diff --git a/env/config/config.go b/env/config/config.go
index 30dc1d6..cf67af6 100644
--- a/env/config/config.go
+++ b/env/config/config.go
@@ -157,6 +157,13 @@ func (n *notificationsMap) UpdateAllNotifications(remoteConfigs []*Notification)
 	}
 }
 
+// UpdateNotify update namespace's notification ID
+func (n *notificationsMap) UpdateNotify(namespaceName string, notificationID int64) {
+	if namespaceName != "" {
+		n.setNotify(namespaceName, notificationID)
+	}
+}
+
 func (n *notificationsMap) setNotify(namespaceName string, notificationID int64) {
 	n.notifications.Store(namespaceName, notificationID)
 }
diff --git a/env/config/config_test.go b/env/config/config_test.go
index 583d2f3..6db6f79 100644
--- a/env/config/config_test.go
+++ b/env/config/config_test.go
@@ -99,3 +99,22 @@ func TestSplitNamespaces(t *testing.T) {
 	Assert(t, l, Equal(3))
 	w.Wait()
 }
+
+func TestNotificationsMap(t *testing.T) {
+	appConfig.Init()
+	ID := appConfig.GetNotificationsMap().GetNotify("application")
+	Assert(t, ID, Equal(int64(-1)))
+
+	appConfig.GetNotificationsMap().UpdateNotify("application", 3)
+	newID := appConfig.GetNotificationsMap().GetNotify("application")
+	Assert(t, newID, Equal(int64(3)))
+
+	appConfig.GetNotificationsMap().UpdateNotify("", 100)
+	noID := appConfig.GetNotificationsMap().GetNotify("")
+	Assert(t, noID, Equal(int64(0)))
+
+	appConfig.GetNotificationsMap().UpdateNotify("noExistNS", 3)
+	noExistID := appConfig.GetNotificationsMap().GetNotify("noExistNs")
+	Assert(t, noExistID, Equal(int64(0)))
+
+}