diff --git a/src/main/java/com/eactive/eai/rms/onl/manage/inflow/group/InflowGroupControlManController.java b/src/main/java/com/eactive/eai/rms/onl/manage/inflow/group/InflowGroupControlManController.java
index ab4fe96..c3e31bf 100644
--- a/src/main/java/com/eactive/eai/rms/onl/manage/inflow/group/InflowGroupControlManController.java
+++ b/src/main/java/com/eactive/eai/rms/onl/manage/inflow/group/InflowGroupControlManController.java
@@ -7,6 +7,14 @@ import java.util.Map;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+import com.eactive.eai.agent.command.CommonCommand;
+import com.eactive.eai.rms.common.base.OnlBaseAnnotationController;
+import com.eactive.eai.rms.common.combo.ComboService;
+import com.eactive.eai.rms.common.combo.ComboVo;
+import com.eactive.eai.rms.common.vo.GridResponse;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
@@ -16,14 +24,6 @@ import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestParam;
 import org.springframework.web.servlet.ModelAndView;
 
-import com.eactive.eai.agent.command.CommonCommand;
-import com.eactive.eai.rms.common.base.OnlBaseAnnotationController;
-import com.eactive.eai.rms.common.combo.ComboService;
-import com.eactive.eai.rms.common.combo.ComboVo;
-import com.eactive.eai.rms.common.vo.GridResponse;
-import com.fasterxml.jackson.core.type.TypeReference;
-import com.fasterxml.jackson.databind.ObjectMapper;
-
 @Controller
 public class InflowGroupControlManController extends OnlBaseAnnotationController {
 
@@ -78,7 +78,7 @@ public class InflowGroupControlManController extends OnlBaseAnnotationController
 	 * 그룹 저장 (INSERT)
 	 */
 	@RequestMapping(value = "/onl/admin/inflow/inflowGroupControlMan.json", params = "cmd=INSERT")
-	public String insert(HttpServletRequest request, HttpServletResponse response, InflowGroupControlManUI ui,
+	public ResponseEntity<Void> insert(HttpServletRequest request, HttpServletResponse response, InflowGroupControlManUI ui,
 			@RequestParam(value = "interfaceListJson", required = false) String interfaceListJson) throws Exception {
 		parseInterfaceList(ui, interfaceListJson);
 		String modifiedBy = getSessionUserId(request);
@@ -88,14 +88,14 @@ public class InflowGroupControlManController extends OnlBaseAnnotationController
 		CommonCommand command = new CommonCommand("com.eactive.eai.agent.inflow.ReloadInflowGroupControlCommand",
 				ui.getGroupId());
 		agentUtilService.broadcast(command);
-		return null;
+		return ResponseEntity.ok().build();
 	}
 
 	/**
 	 * 그룹 저장 (UPDATE)
 	 */
 	@RequestMapping(value = "/onl/admin/inflow/inflowGroupControlMan.json", params = "cmd=UPDATE")
-	public String update(HttpServletRequest request, HttpServletResponse response, InflowGroupControlManUI ui,
+	public ResponseEntity<Void> update(HttpServletRequest request, HttpServletResponse response, InflowGroupControlManUI ui,
 			@RequestParam(value = "interfaceListJson", required = false) String interfaceListJson) throws Exception {
 		parseInterfaceList(ui, interfaceListJson);
 		String modifiedBy = getSessionUserId(request);
@@ -105,21 +105,21 @@ public class InflowGroupControlManController extends OnlBaseAnnotationController
 		CommonCommand command = new CommonCommand("com.eactive.eai.agent.inflow.ReloadInflowGroupControlCommand",
 				ui.getGroupId());
 		agentUtilService.broadcast(command);
-		return null;
+		return ResponseEntity.ok().build();
 	}
 
 	/**
 	 * 그룹 삭제
 	 */
 	@RequestMapping(value = "/onl/admin/inflow/inflowGroupControlMan.json", params = "cmd=DELETE")
-	public String delete(HttpServletRequest request, HttpServletResponse response, String groupId) throws Exception {
+	public ResponseEntity<Void> delete(HttpServletRequest request, HttpServletResponse response, String groupId) throws Exception {
 		service.deleteGroup(groupId);
 
 		// Agent Command 전송
 		CommonCommand command = new CommonCommand("com.eactive.eai.agent.inflow.RemoveInflowGroupControlCommand",
 				groupId);
 		agentUtilService.broadcast(command);
-		return null;
+		return ResponseEntity.ok().build();
 	}
 
 	/**