diff --git a/paddle/api/Arguments.cpp b/paddle/api/Arguments.cpp
index 0cafbd896e2d88aee4406bd0305878ce489bc18d..41beed38a87601cb57072c8966cd0fd2ea156524 100644
--- a/paddle/api/Arguments.cpp
+++ b/paddle/api/Arguments.cpp
@@ -137,6 +137,10 @@ void Arguments::setSlotSequenceDim(size_t idx, IVector* vec) throw(RangeError) {
   a.cpuSequenceDims = m->cast<paddle::IVector>(vec->getSharedPtr());
 }
 
+float Arguments::sumCosts() const {
+  return paddle::Argument::sumCosts(m->outputs);
+}
+
 int64_t Arguments::getBatchSize(size_t idx) const throw(RangeError) {
   auto& a = m->getArg(idx);
   return a.getBatchSize();
diff --git a/paddle/api/PaddleAPI.h b/paddle/api/PaddleAPI.h
index 7521ff4c6c654c4b59e43abb365dad245a9bd189..155e3e3afe6d915ab934a588e5d8a882be58e2a0 100644
--- a/paddle/api/PaddleAPI.h
+++ b/paddle/api/PaddleAPI.h
@@ -454,6 +454,8 @@ public:
                                         IVector* vec) throw(RangeError);
   void setSlotSequenceDim(size_t idx, IVector* vec) throw(RangeError);
 
+  float sumCosts() const;
+
 private:
   static Arguments* createByPaddleArgumentVector(void* ptr);
   void* getInternalArgumentsPtr() const;
diff --git a/paddle/api/test/testArguments.py b/paddle/api/test/testArguments.py
index 8cabecd242fb4eb98c0fe468687ef179245e4535..a04a805d7a64ef906c8388f1241b9ef823e4d9e0 100644
--- a/paddle/api/test/testArguments.py
+++ b/paddle/api/test/testArguments.py
@@ -22,6 +22,8 @@ class TestArguments(unittest.TestCase):
         args = swig_paddle.Arguments.createArguments(1)
         args.setSlotValue(0, m)
 
+        self.assertAlmostEqual(27.0, args.sumCosts())
+
         mat = args.getSlotValue(0)
         assert isinstance(mat, swig_paddle.Matrix)
         np_mat = mat.toNumpyMatInplace()