diff --git a/broker/src/main/java/com/xiaoleilu/loServer/action/channel/GetIsChannelSubscriberAction.java b/broker/src/main/java/com/xiaoleilu/loServer/action/channel/GetIsChannelSubscriberAction.java
new file mode 100755
index 00000000..7a65f8d1
--- /dev/null
+++ b/broker/src/main/java/com/xiaoleilu/loServer/action/channel/GetIsChannelSubscriberAction.java
@@ -0,0 +1,37 @@
+/*
+ * This file is part of the Wildfire Chat package.
+ * (c) Heavyrain2012 <heavyrain.lee@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+package com.xiaoleilu.loServer.action.channel;
+
+import cn.wildfirechat.common.APIPath;
+import cn.wildfirechat.pojos.InputChannelSubscribe;
+import cn.wildfirechat.pojos.InputUserId;
+import cn.wildfirechat.pojos.OutputStringList;
+import com.xiaoleilu.loServer.RestResult;
+import com.xiaoleilu.loServer.annotation.HttpMethod;
+import com.xiaoleilu.loServer.annotation.Route;
+import com.xiaoleilu.loServer.handler.Request;
+import com.xiaoleilu.loServer.handler.Response;
+import io.netty.handler.codec.http.FullHttpRequest;
+
+import java.util.ArrayList;
+
+@Route(APIPath.Channel_Is_Subscriber)
+@HttpMethod("POST")
+public class GetIsChannelSubscriberAction extends ChannelAction {
+
+    @Override
+    public boolean action(Request request, Response response) {
+        if (request.getNettyRequest() instanceof FullHttpRequest) {
+            InputUserId input = getRequestBody(request.getNettyRequest(), InputUserId.class);
+            boolean isSubscriber = messagesStore.checkUserInChannel(input.getUserId(), channelInfo.getTargetId());
+            setResponseContent(RestResult.ok(isSubscriber), response);
+        }
+        return true;
+    }
+}
diff --git a/common/src/main/java/cn/wildfirechat/common/APIPath.java b/common/src/main/java/cn/wildfirechat/common/APIPath.java
index 52e73ee8..63616aee 100644
--- a/common/src/main/java/cn/wildfirechat/common/APIPath.java
+++ b/common/src/main/java/cn/wildfirechat/common/APIPath.java
@@ -104,6 +104,7 @@ public interface APIPath {
     String Channel_Message_Send = "/channel/message/send";
     String Channel_Subscribe = "/channel/subscribe";
     String Channel_Subscriber_List = "/channel/subscriber_list";
+    String Channel_Is_Subscriber = "/channel/is_subscriber";
     String Channel_Application_Get_UserInfo = "/channel/application/get_user_info";
 
     String Robot_User_Info = "/robot/user_info";
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/ChannelServiceApi.java b/sdk/src/main/java/cn/wildfirechat/sdk/ChannelServiceApi.java
index d0e26840..fd3cdddd 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/ChannelServiceApi.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/ChannelServiceApi.java
@@ -9,7 +9,6 @@ import org.apache.commons.codec.digest.DigestUtils;
 import java.util.List;
 
 import static cn.wildfirechat.proto.ProtoConstants.ApplicationType.ApplicationType_Channel;
-import static cn.wildfirechat.proto.ProtoConstants.ApplicationType.ApplicationType_Robot;
 
 //仅专业版支持，社区版不支持
 public class ChannelServiceApi {
@@ -80,6 +79,12 @@ public class ChannelServiceApi {
         return channelHttpUtils.httpJsonPost(path, null, OutputStringList.class);
     }
 
+    public IMResult<Boolean> isSubscriber(String userId) throws Exception {
+        String path = APIPath.Channel_Is_Subscriber;
+        InputUserId input = new InputUserId(userId);
+        return channelHttpUtils.httpJsonPost(path, input, Boolean.class);
+    }
+
     public IMResult<OutputApplicationUserInfo> applicationGetUserInfo(String authCode) throws Exception {
         String path = APIPath.Channel_Application_Get_UserInfo;
         InputApplicationGetUserInfo input = new InputApplicationGetUserInfo();
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
index 75dad928..401e6708 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
@@ -50,10 +50,10 @@ public class Main {
 
 
         //admin使用的是18080端口，超级管理接口，理论上不能对外开放端口，也不能让非内部服务知悉密钥。
-        testAdmin();
+//        testAdmin();
 
         //Robot和Channel都是使用的80端口，第三方可以创建或者为第三方创建，第三方可以使用robot或者channel与IM系统进行对接。
-        testRobot();
+//        testRobot();
         testChannel();
     }
 
@@ -1443,6 +1443,14 @@ public class Main {
             System.exit(-1);
         }
 
+        IMResult<Boolean> booleanIMResult = channelServiceApi.isSubscriber("userId2");
+        if(booleanIMResult != null && booleanIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS && booleanIMResult.getResult()) {
+            System.out.println("is subscriber success");
+        } else {
+            System.out.println("is subscriber failure");
+            System.exit(-1);
+        }
+
         resultVoid = channelServiceApi.unsubscribe("userId2");
         if (resultVoid != null && resultVoid.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
             System.out.println("unsubscriber done");