diff --git a/core/general-server/op/general_infer_helper.h b/core/general-server/op/general_infer_helper.h
new file mode 100644
index 0000000000000000000000000000000000000000..415c888f6880553b8dced11d60ede4961e41fc96
--- /dev/null
+++ b/core/general-server/op/general_infer_helper.h
@@ -0,0 +1,65 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+
+#include <vector>
+#ifdef BCLOUD
+#ifdef WITH_GPU
+#include "paddle/paddle_inference_api.h"
+#else
+#include "paddle/fluid/inference/api/paddle_inference_api.h"
+#endif
+#else
+#include "paddle_inference_api.h"  // NOLINT
+#endif
+#include <string>
+
+namespace baidu {
+namespace paddle_serving {
+namespace serving {
+
+static const char* GENERAL_MODEL_NAME = "general_model";
+
+struct GeneralBlob {
+  std::vector<paddle::PaddleTensor> tensor_vector;
+  double infer_time;
+  std::vector<std::string> fetch_name_vector;
+
+  void Clear() {
+    size_t tensor_count = tensor_vector.size();
+    for (size_t ti = 0; ti < tensor_count; ++ti) {
+      tensor_vector[ti].shape.clear();
+    }
+    tensor_vector.clear();
+  }
+  
+  int GetBatchSize() {
+    if (tensor_vector.size() > 0) {
+      if (tensor_vector[0].lod.size() == 1) {
+        return tensor_vector[0].lod[0].size() - 1;
+      } else {
+        return tensor_vector[0].shape[0];
+      }
+    } else {
+      return -1;
+    }
+  }
+
+  std::string ShortDebugString() const { return "Not implemented!"; }
+}
+
+}  // namespace serving
+}  // namespace paddle_serving
+}  // namespace baidu
diff --git a/core/general-server/op/general_infer_op.cpp b/core/general-server/op/general_infer_op.cpp
index 6755e1cc4502aca70314166038453c5013e582f9..163d7269747d099fc21f6eac63c4a3e3cd61d8d6 100644
--- a/core/general-server/op/general_infer_op.cpp
+++ b/core/general-server/op/general_infer_op.cpp
@@ -16,8 +16,8 @@
 #include <iostream>
 #include <memory>
 #include <sstream>
+#include "core/general-server/op/general_infer_helper.h"
 #include "core/general-server/op/general_infer_op.h"
-#include "core/general-server/op/general_reader_op.h"
 #include "core/predictor/framework/infer.h"
 #include "core/predictor/framework/memory.h"
 #include "core/predictor/framework/resource.h"
@@ -37,23 +37,20 @@ using baidu::paddle_serving::predictor::InferManager;
 using baidu::paddle_serving::predictor::PaddleGeneralModelConfig;
 
 int GeneralInferOp::inference() {
-  const GeneralReaderOutput *reader_out =
-      get_depend_argument<GeneralReaderOutput>("general_reader_op");
-  if (!reader_out) {
-    LOG(ERROR) << "Failed mutable depended argument, op:"
-               << "general_reader_op";
-    return -1;
-  }
+  const GeneralBlob * input_blob =
+      get_depend_argument<GeneralBlob>(pre_name());
 
-  int reader_status = reader_out->reader_status;
-  if (reader_status != 0) {
-    LOG(ERROR) << "Read request wrong.";
+  if (!input_blob) {
+    LOG(ERROR) << "Failed mutable depended argument, op:"
+               << pre_name();
     return -1;
   }
 
-  const TensorVector *in = &reader_out->tensor_vector;
+  const TensorVector *in = &input_blob->tensor_vector;
   TensorVector *out = butil::get_object<TensorVector>();
-  int batch_size = (*in)[0].shape[0];
+  int batch_size = in->GetBatchSize();
+
+  VLOG(2) << "infer batch size: " << batch_size;
   // infer
   Timer timeline;
   double infer_time = 0.0;
@@ -65,73 +62,6 @@ int GeneralInferOp::inference() {
   timeline.Pause();
   infer_time = timeline.ElapsedUS();
 
-  const Request *req = dynamic_cast<const Request *>(get_request_message());
-
-  VLOG(2) << "start to call load general model_conf op";
-  baidu::paddle_serving::predictor::Resource &resource =
-      baidu::paddle_serving::predictor::Resource::instance();
-  
-  VLOG(2) << "get resource pointer done.";
-  std::shared_ptr<PaddleGeneralModelConfig> model_config =
-      resource.get_general_model_config();
-
-  std::vector<int> fetch_index;
-  fetch_index.resize(req->fetch_var_names_size());
-  for (int i = 0; i < req->fetch_var_names_size(); ++i) {
-    fetch_index[i] =
-        model_config->_fetch_alias_name_to_index[req->fetch_var_names(i)];
-  }
-  
-  // response inst with only fetch_var_names
-  Response *res = mutable_data<Response>();
-
-  res->set_mean_infer_us(infer_time);
-
-  for (int i = 0; i < batch_size; ++i) {
-    FetchInst *fetch_inst = res->add_insts();
-    for (auto & idx : fetch_index) {
-      Tensor *tensor = fetch_inst->add_tensor_array();
-      // currently only response float tensor or lod_tensor
-      tensor->set_elem_type(1);
-      if (model_config->_is_lod_fetch[idx]) {
-        VLOG(2) << "out[" << idx << " is lod_tensor";
-        tensor->add_shape(-1);
-      } else {
-        VLOG(2) << "out[" << idx << "] is tensor";
-        for (int k = 1; k < out->at(idx).shape.size(); ++k) {
-          VLOG(2) << "shape[" << k - 1 << "]: "
-                  << out->at(idx).shape[k];
-          tensor->add_shape(out->at(idx).shape[k]);
-        }
-      }
-    }
-  }
-
-  int var_idx = 0;
-  for (auto & idx : fetch_index) {
-    float *data_ptr = static_cast<float *>(out->at(idx).data.data());
-    int cap = 1;
-    for (int j = 1; j < out->at(idx).shape.size(); ++j) {
-      cap *= out->at(idx).shape[j];
-    }
-    if (model_config->_is_lod_fetch[idx]) {
-      for (int j = 0; j < batch_size; ++j) {
-        for (int k = out->at(idx).lod[0][j];
-             k < out->at(idx).lod[0][j + 1]; k++) {
-          res->mutable_insts(j)->mutable_tensor_array(var_idx)->add_data(
-              reinterpret_cast<char *>(&(data_ptr[k])), sizeof(float));
-        }
-      }
-    } else {
-      for (int j = 0; j < batch_size; ++j) {
-        for (int k = j * cap; k < (j + 1) * cap; ++k) {
-          res->mutable_insts(j)->mutable_tensor_array(var_idx)->add_data(
-              reinterpret_cast<char *>(&(data_ptr[k])), sizeof(float));
-        }
-      }
-    }
-    var_idx++;
-  }
   return 0;
 }
 DEFINE_OP(GeneralInferOp);
diff --git a/core/general-server/op/general_infer_op.h b/core/general-server/op/general_infer_op.h
index f6860f0941afb941623bf9b876e128c06f5a0911..70b13cf3cc13d05cb87191aed8a1018f29cdbcdf 100644
--- a/core/general-server/op/general_infer_op.h
+++ b/core/general-server/op/general_infer_op.h
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #pragma once
+#include <string>
 #include <vector>
 #ifdef BCLOUD
 #ifdef WITH_GPU
@@ -29,17 +30,15 @@ namespace baidu {
 namespace paddle_serving {
 namespace serving {
 
-static const char* GENERAL_MODEL_NAME = "general_model";
-
 class GeneralInferOp
-    : public baidu::paddle_serving::predictor::OpWithChannel<
-          baidu::paddle_serving::predictor::general_model::Response> {
+    : public baidu::paddle_serving::predictor::OpWithChannel<GeneralBlob> {
  public:
   typedef std::vector<paddle::PaddleTensor> TensorVector;
 
   DECLARE_OP(GeneralInferOp);
 
   int inference();
+
 };
 
 }  // namespace serving
diff --git a/core/general-server/op/general_reader_op.cpp b/core/general-server/op/general_reader_op.cpp
index 3a4aa72baac753423bf126358c72b50352a2531d..a8b0e52df61c15bae197f3368b60ecffb89b398c 100644
--- a/core/general-server/op/general_reader_op.cpp
+++ b/core/general-server/op/general_reader_op.cpp
@@ -16,6 +16,7 @@
 #include <iostream>
 #include <memory>
 #include <sstream>
+#include "core/general-server/op/general_infer_helper.h"
 #include "core/general-server/op/general_reader_op.h"
 #include "core/predictor/framework/infer.h"
 #include "core/predictor/framework/memory.h"
@@ -77,16 +78,12 @@ int GeneralReaderOp::inference() {
   std::vector<int64_t> elem_size;
   std::vector<int64_t> capacity;
 
-  GeneralReaderOutput *res = mutable_data<GeneralReaderOutput>();
-  TensorVector *in = &res->tensor_vector;
+  GeneralBlob *res = mutable_data<GeneralBlob>();
+  TensorVector *out = &res->tensor_vector;
 
   if (!res) {
     LOG(ERROR) << "Failed get op tls reader object output";
   }
-  if (batch_size <= 0) {
-    res->reader_status = -1;
-    return 0;
-  }
 
   int var_num = req->insts(0).tensor_array_size();
   VLOG(2) << "var num: " << var_num;
@@ -102,7 +99,7 @@ int GeneralReaderOp::inference() {
 
   VLOG(2) << "print general model config done.";
 
-  // check
+  // TODO(guru4elephant): how to do conditional check?
   res->reader_status = conf_check(req, model_config);
   if (res->reader_status != 0) {
     LOG(INFO) << "model conf of server:";
@@ -142,26 +139,26 @@ int GeneralReaderOp::inference() {
       VLOG(2) << "var[" << i << "] is tensor, capacity: " << capacity[i];
     }
     lod_tensor.name = model_config->_feed_name[i];
-    in->push_back(lod_tensor);
+    out->push_back(lod_tensor);
   }
 
   for (int i = 0; i < var_num; ++i) {
-    if (in->at(i).lod.size() == 1) {
+    if (out->at(i).lod.size() == 1) {
       for (int j = 0; j < batch_size; ++j) {
         const Tensor &tensor = req->insts(j).tensor_array(i);
         int data_len = tensor.data_size();
         VLOG(2) << "tensor size for var[" << i << "]: " << tensor.data_size();
-        int cur_len = in->at(i).lod[0].back();
+        int cur_len = out->at(i).lod[0].back();
         VLOG(2) << "current len: " << cur_len;
-        in->at(i).lod[0].push_back(cur_len + data_len);
+        out->at(i).lod[0].push_back(cur_len + data_len);
         VLOG(2) << "new len: " << cur_len + data_len;
       }
-      in->at(i).data.Resize(in->at(i).lod[0].back() * elem_size[i]);
-      in->at(i).shape = {in->at(i).lod[0].back(), 1};
+      out->at(i).data.Resize(out->at(i).lod[0].back() * elem_size[i]);
+      out->at(i).shape = {out->at(i).lod[0].back(), 1};
       VLOG(2) << "var[" << i
-              << "] is lod_tensor and len=" << in->at(i).lod[0].back();
+              << "] is lod_tensor and len=" << out->at(i).lod[0].back();
     } else {
-      in->at(i).data.Resize(batch_size * capacity[i] * elem_size[i]);
+      out->at(i).data.Resize(batch_size * capacity[i] * elem_size[i]);
       VLOG(2) << "var[" << i
               << "] is tensor and capacity=" << batch_size * capacity[i];
     }
@@ -169,29 +166,29 @@ int GeneralReaderOp::inference() {
 
   for (int i = 0; i < var_num; ++i) {
     if (elem_type[i] == 0) {
-      int64_t *dst_ptr = static_cast<int64_t *>(in->at(i).data.data());
+      int64_t *dst_ptr = static_cast<int64_t *>(out->at(i).data.data());
       int offset = 0;
       for (int j = 0; j < batch_size; ++j) {
         for (int k = 0; k < req->insts(j).tensor_array(i).data_size(); ++k) {
           dst_ptr[offset + k] =
               *(const int64_t *)req->insts(j).tensor_array(i).data(k).c_str();
         }
-        if (in->at(i).lod.size() == 1) {
-          offset = in->at(i).lod[0][j + 1];
+        if (out->at(i).lod.size() == 1) {
+          offset = out->at(i).lod[0][j + 1];
         } else {
           offset += capacity[i];
         }
       }
     } else {
-      float *dst_ptr = static_cast<float *>(in->at(i).data.data());
+      float *dst_ptr = static_cast<float *>(out->at(i).data.data());
       int offset = 0;
       for (int j = 0; j < batch_size; ++j) {
         for (int k = 0; k < req->insts(j).tensor_array(i).data_size(); ++k) {
           dst_ptr[offset + k] =
               *(const float *)req->insts(j).tensor_array(i).data(k).c_str();
         }
-        if (in->at(i).lod.size() == 1) {
-          offset = in->at(i).lod[0][j + 1];
+        if (out->at(i).lod.size() == 1) {
+          offset = out->at(i).lod[0][j + 1];
         } else {
           offset += capacity[i];
         }
diff --git a/core/general-server/op/general_reader_op.h b/core/general-server/op/general_reader_op.h
index 4c68d70c37e79bf86838551d899f6cc25b2be923..137fad98083ff6e136ea0446bd0c985a556b62de 100644
--- a/core/general-server/op/general_reader_op.h
+++ b/core/general-server/op/general_reader_op.h
@@ -25,6 +25,7 @@
 #endif
 #include <string>
 #include "core/predictor/framework/resource.h"
+#include "core/general-server/op/general_infer_helper.h"
 #include "core/general-server/general_model_service.pb.h"
 #include "core/general-server/load_general_model_service.pb.h"
 
@@ -32,28 +33,15 @@ namespace baidu {
 namespace paddle_serving {
 namespace serving {
 
-struct GeneralReaderOutput {
-  std::vector<paddle::PaddleTensor> tensor_vector;
-  int reader_status = 0;
-
-  void Clear() {
-    size_t tensor_count = tensor_vector.size();
-    for (size_t ti = 0; ti < tensor_count; ++ti) {
-      tensor_vector[ti].shape.clear();
-    }
-    tensor_vector.clear();
-  }
-  std::string ShortDebugString() const { return "Not implemented!"; }
-};
-
 class GeneralReaderOp : public baidu::paddle_serving::predictor::OpWithChannel<
-                            GeneralReaderOutput> {
+                            GeneralBlob> {
  public:
   typedef std::vector<paddle::PaddleTensor> TensorVector;
 
   DECLARE_OP(GeneralReaderOp);
 
   int inference();
+
 };
 
 }  // namespace serving
diff --git a/core/general-server/op/general_response_op.cpp b/core/general-server/op/general_response_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..377a993dd65d0bcd666c6d767407f80c276cd35a
--- /dev/null
+++ b/core/general-server/op/general_response_op.cpp
@@ -0,0 +1,129 @@
+// Copyright (c) 2020 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <iostream>
+#include <memory>
+#include <sstream>
+#include "core/general-server/op/general_infer_helper.h"
+#include "core/general-server/op/general_response_op.h"
+#include "core/predictor/framework/infer.h"
+#include "core/predictor/framework/memory.h"
+#include "core/predictor/framework/resource.h"
+#include "core/util/include/timer.h"
+
+namespace baidu {
+namespace paddle_serving {
+namespace serving {
+
+using baidu::paddle_serving::Timer;
+using baidu::paddle_serving::predictor::MempoolWrapper;
+using baidu::paddle_serving::predictor::general_model::Tensor;
+using baidu::paddle_serving::predictor::general_model::Response;
+using baidu::paddle_serving::predictor::general_model::Request;
+using baidu::paddle_serving::predictor::general_model::FetchInst;
+using baidu::paddle_serving::predictor::InferManager;
+using baidu::paddle_serving::predictor::PaddleGeneralModelConfig;
+
+int GeneralResponseOp::inference() {
+  const GeneralBlob *input_blob =
+      get_depend_argument<GeneralBlob>(pre_name());
+
+  if (!input_blob) {
+    LOG(ERROR) << "Failed mutable depended argument, op: "
+               << pre_name();
+    return -1;
+  }
+
+  const TensorVector *in = &input_blob->tensor_vector;
+  int batch_size = in->GetBatchSize();
+  double infer_time = in->infer_time;
+
+  VLOG(2) << "input batch size: " << batch_size;
+
+  const Request *req = dynamic_cast<const Request *>(get_request_message());
+
+  VLOG(2) << "start to call load general model_conf op";
+  baidu::paddle_serving::predictor::Resource &resource =
+      baidu::paddle_serving::predictor::Resource::instance();
+  
+  VLOG(2) << "get resource pointer done.";
+  std::shared_ptr<PaddleGeneralModelConfig> model_config =
+      resource.get_general_model_config();
+
+  std::vector<int> fetch_index;
+  fetch_index.resize(req->fetch_var_names_size());
+  for (int i = 0; i < req->fetch_var_names_size(); ++i) {
+    fetch_index[i] =
+        model_config->_fetch_alias_name_to_index[req->fetch_var_names(i)];
+  }
+  
+  // response inst with only fetch_var_names
+  Response *res = mutable_data<Response>();
+
+  res->set_mean_infer_us(infer_time);
+
+  for (int i = 0; i < batch_size; ++i) {
+    FetchInst *fetch_inst = res->add_insts();
+    for (auto & idx : fetch_index) {
+      Tensor *tensor = fetch_inst->add_tensor_array();
+      // currently only response float tensor or lod_tensor
+      tensor->set_elem_type(1);
+      if (model_config->_is_lod_fetch[idx]) {
+        VLOG(2) << "out[" << idx << " is lod_tensor";
+        tensor->add_shape(-1);
+      } else {
+        VLOG(2) << "out[" << idx << "] is tensor";
+        for (int k = 1; k < in->at(idx).shape.size(); ++k) {
+          VLOG(2) << "shape[" << k - 1 << "]: "
+                  << in->at(idx).shape[k];
+          tensor->add_shape(in->at(idx).shape[k]);
+        }
+      }
+    }
+  }
+
+  int var_idx = 0;
+  for (auto & idx : fetch_index) {
+    float *data_ptr = static_cast<float *>(in->at(idx).data.data());
+    int cap = 1;
+    for (int j = 1; j < in->at(idx).shape.size(); ++j) {
+      cap *= in->at(idx).shape[j];
+    }
+    if (model_config->_is_lod_fetch[idx]) {
+      for (int j = 0; j < batch_size; ++j) {
+        for (int k = in->at(idx).lod[0][j];
+             k < in->at(idx).lod[0][j + 1]; k++) {
+          res->mutable_insts(j)->mutable_tensor_array(var_idx)->add_data(
+              reinterpret_cast<char *>(&(data_ptr[k])), sizeof(float));
+        }
+      }
+    } else {
+      for (int j = 0; j < batch_size; ++j) {
+        for (int k = j * cap; k < (j + 1) * cap; ++k) {
+          res->mutable_insts(j)->mutable_tensor_array(var_idx)->add_data(
+              reinterpret_cast<char *>(&(data_ptr[k])), sizeof(float));
+        }
+      }
+    }
+    var_idx++;
+  }
+  return 0;
+}
+
+DEFINE_OP(GeneralResponseOp);
+
+}  // namespace serving
+}  // namespace paddle_serving
+}  // namespace baidu
diff --git a/core/general-server/op/general_text_infer_op.h b/core/general-server/op/general_response_op.h
similarity index 94%
rename from core/general-server/op/general_text_infer_op.h
rename to core/general-server/op/general_response_op.h
index 5c94a205f8fc03cb8b4d23bb556a8755b7cb55ea..95b9f7708df82dc1ce750cb4067b79c8ca60fd05 100644
--- a/core/general-server/op/general_text_infer_op.h
+++ b/core/general-server/op/general_response_op.h
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 #pragma once
+#include <string>
 #include <vector>
 #ifdef BCLOUD
 #ifdef WITH_GPU
@@ -29,15 +30,16 @@ namespace baidu {
 namespace paddle_serving {
 namespace serving {
 
-class GeneralTextInferOp
+class GeneralResponseOp
     : public baidu::paddle_serving::predictor::OpWithChannel<
           baidu::paddle_serving::predictor::general_model::Response> {
  public:
   typedef std::vector<paddle::PaddleTensor> TensorVector;
 
-  DECLARE_OP(GeneralTextInferOp);
+  DECLARE_OP(GeneralResponseOp);
 
   int inference();
+
 };
 
 }  // namespace serving
diff --git a/core/general-server/op/general_text_reader_op.cpp b/core/general-server/op/general_text_reader_op.cpp
index 9e3c489f6557d6d5e9931ca317718e5f4e3e3683..7f13c1a1e27206ba68e81720c8a4d13c9fad6339 100644
--- a/core/general-server/op/general_text_reader_op.cpp
+++ b/core/general-server/op/general_text_reader_op.cpp
@@ -17,6 +17,7 @@
 #include <memory>
 #include <sstream>
 #include "core/general-server/op/general_text_reader_op.h"
+#include "core/general-server/op/general_infer_helper.h"
 #include "core/predictor/framework/infer.h"
 #include "core/predictor/framework/memory.h"
 
@@ -42,7 +43,7 @@ int GeneralTextReaderOp::inference() {
   std::vector<int64_t> elem_size;
   std::vector<int64_t> capacity;
 
-  GeneralTextReaderOutput *res = mutable_data<GeneralTextReaderOutput>();
+  GeneralBlob *res = mutable_data<GeneralBlob>();
   TensorVector *in = &res->tensor_vector;
 
   if (!res) {
diff --git a/core/general-server/op/general_text_reader_op.h b/core/general-server/op/general_text_reader_op.h
index e7f484a9915609887c2a6593ff1ad0655fc4789c..3f9eb5deb1a48789c6a85674de73c333aa08f1af 100644
--- a/core/general-server/op/general_text_reader_op.h
+++ b/core/general-server/op/general_text_reader_op.h
@@ -32,23 +32,8 @@ namespace baidu {
 namespace paddle_serving {
 namespace serving {
 
-struct GeneralTextReaderOutput {
-  std::vector<paddle::PaddleTensor> tensor_vector;
-  int reader_status = 0;
-
-  void Clear() {
-    size_t tensor_count = tensor_vector.size();
-    for (size_t ti = 0; ti < tensor_count; ++ti) {
-      tensor_vector[ti].shape.clear();
-    }
-    tensor_vector.clear();
-  }
-  std::string ShortDebugString() const { return "Not implemented!"; }
-};
-
 class GeneralTextReaderOp :
-    public baidu::paddle_serving::predictor::OpWithChannel<
-    GeneralTextReaderOutput> {
+    public baidu::paddle_serving::predictor::OpWithChannel<GeneralBlob> {
  public:
   typedef std::vector<paddle::PaddleTensor> TensorVector;
 
diff --git a/core/general-server/op/general_text_infer_op.cpp b/core/general-server/op/general_text_response_op.cpp
similarity index 66%
rename from core/general-server/op/general_text_infer_op.cpp
rename to core/general-server/op/general_text_response_op.cpp
index 7bc43545ebbf3c206e6d2495af284f8c284b896c..7e67ce86e8f1616e320167a833d9a98f70ad3d99 100644
--- a/core/general-server/op/general_text_infer_op.cpp
+++ b/core/general-server/op/general_text_response_op.cpp
@@ -16,10 +16,8 @@
 #include <iostream>
 #include <memory>
 #include <sstream>
-#include "core/general-server/op/general_text_infer_op.h"
-#include "core/general-server/op/general_infer_op.h"
-#include "core/general-server/op/general_text_reader_op.h"
-#include "core/general-server/op/general_reader_op.h"
+#include "core/general-server/op/general_text_response_op.h"
+#include "core/general-server/op/general_infer_helper.h"
 #include "core/predictor/framework/infer.h"
 #include "core/predictor/framework/memory.h"
 #include "core/predictor/framework/resource.h"
@@ -29,7 +27,6 @@ namespace baidu {
 namespace paddle_serving {
 namespace serving {
 
-using baidu::paddle_serving::serving::GENERAL_MODEL_NAME;
 using baidu::paddle_serving::Timer;
 using baidu::paddle_serving::predictor::MempoolWrapper;
 using baidu::paddle_serving::predictor::general_model::Tensor;
@@ -40,42 +37,20 @@ using baidu::paddle_serving::predictor::InferManager;
 using baidu::paddle_serving::predictor::PaddleGeneralModelConfig;
 
 int GeneralTextInferOp::inference() {
-  const GeneralTextReaderOutput *reader_out =
-      get_depend_argument<GeneralTextReaderOutput>(pre_name());
+  const GeneralBlob *blob_input =
+      get_depend_argument<GeneralBlob>(pre_name());
 
-  VLOG(2) << "Going to get previous node name: " << pre_name();
-
-  if (!reader_out) {
-    LOG(ERROR) << "Failed mutable depended argument, op:"
-               << "general_text_reader_op";
+  if (!blob_input) {
+    LOG(ERROR) << "Failed mutable depended argument, op: "
+               << pre_name();
     return -1;
   }
 
-  int reader_status = reader_out->reader_status;
-  if (reader_status != 0) {
-    LOG(ERROR) << "Read request wrong.";
-    return -1;
-  }
+  const TensorVector *in = &blob_input->tensor_vector;
+  int batch_size = in->GetBatchSize();
 
-  const TensorVector *in = &reader_out->tensor_vector;
-  TensorVector *out = butil::get_object<TensorVector>();
-  int batch_size = 0;
-  if (in->at(0).lod.size() == 1) {
-    batch_size = in->at(0).lod[0].size() - 1;
-  } else {
-    batch_size = in->at(0).shape[0];
-  }
   VLOG(2) << "infer batch size: " << batch_size;
   // infer
-  Timer timeline;
-  double infer_time = 0.0;
-  timeline.Start();
-  if (InferManager::instance().infer(GENERAL_MODEL_NAME, in, out, batch_size)) {
-    LOG(ERROR) << "Failed do infer in fluid model: " << GENERAL_MODEL_NAME;
-    return -1;
-  }
-  timeline.Pause();
-  infer_time = timeline.ElapsedUS();
 
   const Request *req = dynamic_cast<const Request *>(get_request_message());
 
@@ -110,10 +85,10 @@ int GeneralTextInferOp::inference() {
         tensor->add_shape(-1);
       } else {
         VLOG(2) << "out[" << idx << "] is tensor";
-        for (int k = 1; k < out->at(idx).shape.size(); ++k) {
+        for (int k = 1; k < in->at(idx).shape.size(); ++k) {
           VLOG(2) << "shape[" << k - 1 << "]: "
-                  << out->at(idx).shape[k];
-          tensor->add_shape(out->at(idx).shape[k]);
+                  << in->at(idx).shape[k];
+          tensor->add_shape(in->at(idx).shape[k]);
         }
       }
     }
@@ -121,15 +96,15 @@ int GeneralTextInferOp::inference() {
 
   int var_idx = 0;
   for (auto & idx : fetch_index) {
-    float *data_ptr = static_cast<float *>(out->at(idx).data.data());
+    float *data_ptr = static_cast<float *>(in->at(idx).data.data());
     int cap = 1;
-    for (int j = 1; j < out->at(idx).shape.size(); ++j) {
-      cap *= out->at(idx).shape[j];
+    for (int j = 1; j < in->at(idx).shape.size(); ++j) {
+      cap *= in->at(idx).shape[j];
     }
     if (model_config->_is_lod_fetch[idx]) {
       for (int j = 0; j < batch_size; ++j) {
-        for (int k = out->at(idx).lod[0][j];
-             k < out->at(idx).lod[0][j + 1]; k++) {
+        for (int k = in->at(idx).lod[0][j];
+             k < in->at(idx).lod[0][j + 1]; k++) {
           res->mutable_insts(j)->mutable_tensor_array(var_idx)->add_float_data(
               data_ptr[k]);
         }
@@ -146,7 +121,7 @@ int GeneralTextInferOp::inference() {
   }
   return 0;
 }
-DEFINE_OP(GeneralTextInferOp);
+DEFINE_OP(GeneralTextResponseOp);
 
 }  // namespace serving
 }  // namespace paddle_serving
diff --git a/core/general-server/op/general_text_response_op.h b/core/general-server/op/general_text_response_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..a062ea3f6553bbf3fffa175277b28e3a5c837143
--- /dev/null
+++ b/core/general-server/op/general_text_response_op.h
@@ -0,0 +1,47 @@
+// Copyright (c) 2019 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#pragma once
+#include <string>
+#include <vector>
+#ifdef BCLOUD
+#ifdef WITH_GPU
+#include "paddle/paddle_inference_api.h"
+#else
+#include "paddle/fluid/inference/api/paddle_inference_api.h"
+#endif
+#else
+#include "paddle_inference_api.h"  // NOLINT
+#endif
+#include "core/general-server/general_model_service.pb.h"
+
+namespace baidu {
+namespace paddle_serving {
+namespace serving {
+
+class GeneralTextResponseOp
+    : public baidu::paddle_serving::predictor::OpWithChannel<
+          baidu::paddle_serving::predictor::general_model::Response> {
+ public:
+  typedef std::vector<paddle::PaddleTensor> TensorVector;
+
+  DECLARE_OP(GeneralTextResponseOp);
+
+  int inference();
+
+};
+
+}  // namespace serving
+}  // namespace paddle_serving
+}  // namespace baidu