diff --git a/src/fpga/api.h b/src/fpga/api.h
index 83eca9e2688d7076d33818d992cafb5a4c05df01..f5fa05b6750996ee391a30d2651a69d90e357547 100644
--- a/src/fpga/api.h
+++ b/src/fpga/api.h
@@ -20,8 +20,6 @@ limitations under the License. */
 #include <limits>
 #include "framework/tensor.h"
 
-// memory management;
-
 namespace paddle_mobile {
 namespace fpga {
 
@@ -45,9 +43,6 @@ struct MemoryCopyArgs {
   size_t size;
 };
 
-/**
-Conv and Pooling kernel
-*/
 struct KernelArgs {
   uint32_t width;
   uint32_t height;
@@ -109,7 +104,6 @@ struct PoolingArgs {
   struct ImageOutputArgs output;
 };
 
-// elementwise add arguments
 struct EWAddArgs {
   bool relu_enabled;
 
diff --git a/src/framework/tensor.h b/src/framework/tensor.h
index c5572dcbfdbd665994be7ebe005b6c9c98b5bca9..ba8e3d3402f16966f08c370bff8cd6b0d1f2637b 100644
--- a/src/framework/tensor.h
+++ b/src/framework/tensor.h
@@ -289,12 +289,8 @@ class Tensor {
     virtual std::type_index type() const { return type_; }
 
     virtual void set_type(std::type_index type) { type_ = type; }
-#ifndef PADDLE_MOBILE_FPGA
-    /*! the pointer of memory block. */
+
     std::unique_ptr<uint8_t, memory::PODDeleter<uint8_t>> ptr_;
-#else
-    std::shared_ptr<uint8_t> ptr_;
-#endif
 
     /*! the size of memory block. */
     size_t size_;
diff --git a/src/io/executor.cpp b/src/io/executor.cpp
index 8bc3c15c6d761234f5f45a645fde81ff97822f03..c12f1ce02c8ab32d04d00d76cad5dc7d6ce45bc2 100644
--- a/src/io/executor.cpp
+++ b/src/io/executor.cpp
@@ -662,13 +662,15 @@ void Executor<Dtype, P>::FeedData(const framework::Tensor &t) {
 };
 
 template <typename Dtype, Precision P>
-std::shared_ptr<framework::Tensor> Executor<Dtype, P>::FetchResult() {
+std::shared_ptr<framework::Tensor> Executor<Dtype, P>::FetchResult(int id) {
   std::shared_ptr<framework::BlockDesc> to_predict_block =
       to_predict_program_->Block(0);
   auto &ops = ops_of_block_[*to_predict_block.get()];
-  auto last_op = ops.rbegin();
-  auto output_map = (*last_op)->Outputs();
-  std::vector<std::string> out_keys = (*last_op)->GetOutKeys();
+
+  PADDLE_MOBILE_ENFORCE(id < ops.size(), "Index out of range");
+  auto last_op = id < 0 ? ops[ops.size() - 1] : ops[id];
+  auto output_map = last_op->Outputs();
+  std::vector<std::string> out_keys = last_op->GetOutKeys();
   PADDLE_MOBILE_ENFORCE(!out_keys.empty(), "the last op contains no output");
   auto *output_tensor = framework::GetVarValue<framework::LoDTensor>(
       out_keys[0], output_map, *(program_.scope));
diff --git a/src/io/executor.h b/src/io/executor.h
index bec9f45444a7502c1b6a119f80f55220765efe50..67d3f02ac37c4203950a2679d30d7aa9072c70ba 100644
--- a/src/io/executor.h
+++ b/src/io/executor.h
@@ -99,7 +99,7 @@ class Executor {
  public:
   void InjectVariable(const framework::Tensor &t, string var_name);
   void FeedData(const framework::Tensor &t);
-  std::shared_ptr<framework::Tensor> FetchResult();
+  std::shared_ptr<framework::Tensor> FetchResult(int id = -1);
   void Predict_From_To(int start = 0, int end = -1);
   void Predict_From(int start);
   void Predict_To(int end);
diff --git a/src/io/paddle_mobile.cpp b/src/io/paddle_mobile.cpp
index 9710a0ec452db3381e051db95d7da81b48f5f154..0b84f1ff45e519dbbc244863db481f2364907a89 100644
--- a/src/io/paddle_mobile.cpp
+++ b/src/io/paddle_mobile.cpp
@@ -138,8 +138,8 @@ void PaddleMobile<Dtype, P>::FeedData(const framework::Tensor &t) {
 };
 
 template <typename Dtype, Precision P>
-std::shared_ptr<framework::Tensor> PaddleMobile<Dtype, P>::FetchResult() {
-  return executor_->FetchResult();
+std::shared_ptr<framework::Tensor> PaddleMobile<Dtype, P>::FetchResult(int id) {
+  return executor_->FetchResult(id);
 };
 
 template <typename Dtype, Precision P>
diff --git a/src/io/paddle_mobile.h b/src/io/paddle_mobile.h
index b11f7d7c3b8fc051c1d0da17e769225aab0dc968..73c5553d91c1b4781718265aba8b7fa8dd5e2777 100644
--- a/src/io/paddle_mobile.h
+++ b/src/io/paddle_mobile.h
@@ -97,7 +97,7 @@ class PaddleMobile {
  public:
   void InjectVariable(const framework::Tensor &t, string var_name);
   void FeedData(const framework::Tensor &t);
-  std::shared_ptr<framework::Tensor> FetchResult();
+  std::shared_ptr<framework::Tensor> FetchResult(int id = -1);
   void Predict_From_To(int start = 0, int end = -1);
   void Predict_From(int start);
   void Predict_To(int end);
diff --git a/test/net/test_resnet.cpp b/test/net/test_resnet.cpp
index dfc40f86c4849c768334030cfbc96f0fea9a0178..d2a4abbbfd2c023f1e8220e74f815eda44acb6db 100644
--- a/test/net/test_resnet.cpp
+++ b/test/net/test_resnet.cpp
@@ -54,7 +54,13 @@ int main() {
     paddle_mobile.FeedData(input_tensor);
     paddle_mobile.Predict_To(10);
     paddle_mobile.Predict_From(10);
-    paddle_mobile.FetchResult();
+    auto tensor_ptr = paddle_mobile.FetchResult(9);
+    std::cout << "Tensor element number for op[9]: " << tensor_ptr->numel()
+              << std::endl;
+    auto result_ptr = paddle_mobile.FetchResult();
+    std::cout << "Result tensor element number: " << result_ptr->numel()
+              << std::endl;
+
     auto time4 = time();
     std::cout << "predict cost :" << time_diff(time3, time4) << "ms"
               << std::endl;