diff --git a/apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/v1/controller/ItemController.java b/apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/v1/controller/ItemController.java
index 5fda72412f2770097b85f3eec87b5bb790908262..fb3d3b06eb95fb55e45345d25aeeef14158994e4 100644
--- a/apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/v1/controller/ItemController.java
+++ b/apollo-portal/src/main/java/com/ctrip/framework/apollo/openapi/v1/controller/ItemController.java
@@ -35,8 +35,7 @@ public class ItemController {
   @PreAuthorize(value = "@consumerPermissionValidator.hasModifyNamespacePermission(#request, #appId, #namespaceName)")
   @RequestMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items", method = RequestMethod.POST)
   public OpenItemDTO createItem(@PathVariable String appId, @PathVariable String env,
-                                @PathVariable String clusterName, @PathVariable String
-                                    namespaceName,
+                                @PathVariable String clusterName, @PathVariable String namespaceName,
                                 @RequestBody OpenItemDTO item, HttpServletRequest request) {
 
     RequestPrecondition.checkArguments(
@@ -60,48 +59,53 @@ public class ItemController {
   }
 
   @PreAuthorize(value = "@consumerPermissionValidator.hasModifyNamespacePermission(#request, #appId, #namespaceName)")
-  @RequestMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items/{itemId}", method = RequestMethod.PUT)
+  @RequestMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items/{key:.+}", method = RequestMethod.PUT)
   public void updateItem(@PathVariable String appId, @PathVariable String env,
                          @PathVariable String clusterName, @PathVariable String namespaceName,
-                         @PathVariable long itemId, @RequestBody OpenItemDTO item,
-                         HttpServletRequest request) {
+                         @PathVariable String key, @RequestBody OpenItemDTO item, HttpServletRequest request) {
+
+    RequestPrecondition.checkArguments(item != null, "item payload can not be empty");
 
-    RequestPrecondition.checkArguments(item != null && item.getId() > 0 && itemId == item.getId(),
-        "item data error");
     RequestPrecondition.checkArguments(
-        !StringUtils.isContainEmpty(item.getKey(), item.getValue(), item
-            .getDataChangeLastModifiedBy()),
+        !StringUtils.isContainEmpty(item.getKey(), item.getValue(), item.getDataChangeLastModifiedBy()),
         "key,value,dataChangeLastModifiedBy 字段不能为空");
 
+    RequestPrecondition.checkArguments(item.getKey().equals(key), "item payload can not be empty");
+
     if (userService.findByUserId(item.getDataChangeLastModifiedBy()) == null) {
-      throw new BadRequestException("用户不存在.");
+      throw new BadRequestException("用户不存在");
     }
 
-    ItemDTO toUpdateItem = itemService.loadItem(Env.fromString(env), itemId);
+    ItemDTO toUpdateItem = itemService.loadItem(Env.fromString(env), appId, clusterName, namespaceName, item.getKey());
     if (toUpdateItem == null) {
-      throw new BadRequestException("item not exist");
+      throw new BadRequestException("item不存在");
     }
     //protect. only value,comment,lastModifiedBy can be modified
     toUpdateItem.setComment(item.getComment());
     toUpdateItem.setValue(item.getValue());
     toUpdateItem.setDataChangeLastModifiedBy(item.getDataChangeLastModifiedBy());
 
-    itemService.updateItem(appId, Env.fromString(env), clusterName, namespaceName,
-        toUpdateItem);
+    itemService.updateItem(appId, Env.fromString(env), clusterName, namespaceName, toUpdateItem);
   }
 
 
   @PreAuthorize(value = "@consumerPermissionValidator.hasModifyNamespacePermission(#request, #appId, #namespaceName)")
-  @RequestMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items/{itemId}", method = RequestMethod.DELETE)
+  @RequestMapping(value = "/apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items/{key:.+}", method = RequestMethod.DELETE)
   public void deleteItem(@PathVariable String appId, @PathVariable String env,
                          @PathVariable String clusterName, @PathVariable String namespaceName,
-                         @PathVariable long itemId, @RequestParam String operator,
+                         @PathVariable String key, @RequestParam String operator,
                          HttpServletRequest request) {
 
     if (userService.findByUserId(operator) == null) {
-      throw new BadRequestException("用户不存在.");
+      throw new BadRequestException("用户不存在");
+    }
+
+    ItemDTO toDeletedItem = itemService.loadItem(Env.valueOf(env), appId, clusterName, namespaceName, key);
+    if (toDeletedItem == null){
+      throw new BadRequestException("item不存在");
     }
-    itemService.deleteItem(Env.fromString(env), itemId, operator);
+
+    itemService.deleteItem(Env.fromString(env), toDeletedItem.getId(), operator);
   }
 
 }
diff --git a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java
index 9b05f8d127c50370db0c6a0c5202902bb5abfe7d..43db3227ae98899b4e38711356a4c80ea5bcba4b 100644
--- a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java
+++ b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/api/AdminServiceAPI.java
@@ -90,8 +90,9 @@ public class AdminServiceAPI {
       return Arrays.asList(itemDTOs);
     }
 
-    public ItemDTO loadItem(Env env, long itemId) {
-      return restTemplate.get(env, "/items/{itemId}", ItemDTO.class, itemId);
+    public ItemDTO loadItem(Env env, String appId, String clusterName, String namespaceName, String key) {
+      return restTemplate.get(env, "apps/{appId}/clusters/{clusterName}/namespaces/{namespaceName}/items/{key}",
+                              ItemDTO.class, appId, clusterName, namespaceName, key);
     }
 
     public void updateItemsByChangeSet(String appId, Env env, String clusterName, String namespace,
diff --git a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java
index d97c8b0f3ec5a02406580e92161b44046f165599..b627f4b90789df3fbb4a56b1075ec9f58b184295 100644
--- a/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java
+++ b/apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/service/ItemService.java
@@ -114,8 +114,8 @@ public class ItemService {
     return itemAPI.findItems(appId, env, clusterName, namespaceName);
   }
 
-  public ItemDTO loadItem(Env env, long itemId) {
-    return itemAPI.loadItem(env, itemId);
+  public ItemDTO loadItem(Env env, String appId, String clusterName, String namespaceName, String key) {
+    return itemAPI.loadItem(env, appId, clusterName, namespaceName, key);
   }
 
   public void syncItems(List<NamespaceIdentifier> comparedNamespaces, List<ItemDTO> sourceItems) {