diff --git a/bilean/api/openstack/v1/consumptions.py b/bilean/api/openstack/v1/consumptions.py
index 6efab17..0e9b872 100644
--- a/bilean/api/openstack/v1/consumptions.py
+++ b/bilean/api/openstack/v1/consumptions.py
@@ -68,10 +68,15 @@ class ConsumptionController(object):
             'user_id': 'single',
             'start_time': 'single',
             'end_time': 'single',
+            'summary': 'single',
         }
         params = util.get_allowed_params(req.params, param_whitelist)
         filters = util.get_allowed_params(req.params, filter_whitelist)
 
+        key = consts.PARAM_SUMMARY
+        if key in params:
+            params[key] = utils.parse_bool_param(key, params[key])
+
         if not filters:
             filters = None
         statistics = self.rpc_client.consumption_statistics(req.context,
diff --git a/bilean/common/consts.py b/bilean/common/consts.py
index d377551..18ea73c 100644
--- a/bilean/common/consts.py
+++ b/bilean/common/consts.py
@@ -54,11 +54,11 @@ ACTION_STATUSES = (
 RPC_PARAMS = (
     PARAM_SHOW_DELETED, PARAM_SHOW_NESTED, PARAM_LIMIT, PARAM_MARKER,
     PARAM_GLOBAL_PROJECT, PARAM_SHOW_DETAILS,
-    PARAM_SORT_DIR, PARAM_SORT_KEYS,
+    PARAM_SORT_DIR, PARAM_SORT_KEYS, PARAM_SUMMARY,
 ) = (
     'show_deleted', 'show_nested', 'limit', 'marker',
     'global_project', 'show_details',
-    'sort_dir', 'sort_keys',
+    'sort_dir', 'sort_keys', 'summary',
 )
 
 USER_KEYS = (
diff --git a/bilean/common/utils.py b/bilean/common/utils.py
index 17bc9cb..1b2bbd5 100644
--- a/bilean/common/utils.py
+++ b/bilean/common/utils.py
@@ -167,7 +167,10 @@ def format_time_to_seconds(t):
     if isinstance(t, datetime.datetime):
         return (t - epoch).total_seconds()
     if isinstance(t, six.string_types):
-        dt = timeutils.parse_strtime(t)
+        try:
+            dt = timeutils.parse_strtime(t)
+        except ValueError:
+            dt = timeutils.normalize_time(timeutils.parse_isotime(t))
         return (dt - epoch).total_seconds()
     return t
 
diff --git a/bilean/engine/service.py b/bilean/engine/service.py
index c4f9f73..24da767 100644
--- a/bilean/engine/service.py
+++ b/bilean/engine/service.py
@@ -690,6 +690,7 @@ class EngineService(service.Service):
     def consumption_list(self, cnxt, user_id=None, limit=None,
                          marker=None, sort_keys=None, sort_dir=None,
                          filters=None, project_safe=True):
+        user_id = user_id or cnxt.project
         if limit is not None:
             limit = utils.parse_int_param('limit', limit)
 
@@ -705,8 +706,9 @@ class EngineService(service.Service):
 
     @request_context
     def consumption_statistics(self, cnxt, user_id=None, filters=None,
-                               start_time=None, end_time=None,
+                               start_time=None, end_time=None, summary=False,
                                project_safe=True):
+        user_id = user_id or cnxt.project
         result = {}
         if start_time is None:
             start_time = 0
@@ -732,10 +734,18 @@ class EngineService(service.Service):
             st = max(cons.start_time, start_time)
             seconds = et - st
             cost = cons.rate * seconds
-            if cons.resource_type not in result:
-                result[cons.resource_type] = cost
+            if summary:
+                if cons.resource_type not in result:
+                    result[cons.resource_type] = cost
+                else:
+                    result[cons.resource_type] += cost
             else:
-                result[cons.resource_type] += cost
+                if cons.resource_id not in result:
+                    tmp = {'resource_type': cons.resource_type,
+                           'cost': cost}
+                    result[cons.resource_id] = tmp
+                else:
+                    result[cons.resource_id]['cost'] += cost
 
         resources = plugin_base.Resource.load_all(cnxt, user_id=user_id,
                                                   filters=filters,
@@ -747,11 +757,32 @@ class EngineService(service.Service):
             st = max(res.last_bill, start_time)
             seconds = et - st
             cost = res.rate * seconds
-            if res.resource_type not in result:
-                result[res.resource_type] = cost
+            if summary:
+                if res.resource_type not in result:
+                    result[res.resource_type] = cost
+                else:
+                    result[res.resource_type] += cost
             else:
-                result[res.resource_type] += cost
+                if res.id not in result:
+                    tmp = {'resource_type': res.resource_type,
+                           'cost': cost}
+                    result[res.id] = tmp
+                else:
+                    result[res.id]['cost'] += cost
 
-        for key in six.iterkeys(result):
-            result[key] = utils.dec2str(result[key])
-        return result
+        if summary:
+            for key in six.iterkeys(result):
+                result[key] = utils.dec2str(result[key])
+            return result
+        else:
+            consumptions = []
+            for key in six.iterkeys(result):
+                consumption = cons_mod.Consumption(
+                    user_id,
+                    resource_id=key,
+                    resource_type=result[key]['resource_type'],
+                    cost=result[key]['cost'],
+                    start_time=start_time,
+                    end_time=end_time)
+                consumptions.append(consumption.to_dict())
+            return consumptions
diff --git a/bilean/rpc/client.py b/bilean/rpc/client.py
index a0ea46c..f9848f9 100644
--- a/bilean/rpc/client.py
+++ b/bilean/rpc/client.py
@@ -224,11 +224,12 @@ class EngineClient(object):
                                              project_safe=project_safe))
 
     def consumption_statistics(self, ctxt, user_id=None, filters=None,
-                               start_time=None, end_time=None,
+                               start_time=None, end_time=None, summary=False,
                                project_safe=True):
         return self.call(ctxt, self.make_msg('consumption_statistics',
                                              user_id=user_id,
                                              filters=filters,
                                              start_time=start_time,
                                              end_time=end_time,
+                                             summary=summary,
                                              project_safe=project_safe))