diff --git a/core/model.py b/core/model.py
index 6293e28d3b6a07c794a8ed96214ba66976f7e563..265f5311d2a49601fb21addc9031358170a287fd 100755
--- a/core/model.py
+++ b/core/model.py
@@ -41,6 +41,7 @@ class ModelBase(object):
         self._init_hyper_parameters()
         self._env = config
         self._slot_inited = False
+        self._clear_metrics = None
 
     def _init_hyper_parameters(self):
         pass
@@ -111,8 +112,23 @@ class ModelBase(object):
     def get_infer_inputs(self):
         return self._infer_data_var
 
+    def get_clear_metrics(self):
+        if self._clear_metrics is not None:
+            return self._clear_metrics
+        self._clear_metrics = []
+        for key in self._infer_results:
+            if isinstance(self._infer_results[key], Metric):
+                self._clear_metrics.append(self._infer_results[key])
+        return self._clear_metrics
+
     def get_infer_results(self):
-        return self._infer_results
+        res = dict()
+        for key in self._infer_results:
+            if isinstance(self._infer_results[key], Metric):
+                res.update(self._infer_results[key].get_result())
+            elif isinstance(self._infer_results[key], Variable):
+                res[key] = self._infer_results[key]
+        return res
 
     def get_avg_cost(self):
         """R