diff --git a/docs/api_docs/cpp/main_page.md b/docs/api_docs/cpp/main_page.md
index 116ce95b0..46a4d0ba1 100755
--- a/docs/api_docs/cpp/main_page.md
+++ b/docs/api_docs/cpp/main_page.md
@@ -26,3 +26,5 @@ Currently, FastDeploy supported backends listed as below,
 | Task | Model | API | Example |
 | :---- | :---- | :---- | :----- |
 | object detection | PaddleDetection/PPYOLOE | [fastdeploy::vision::detection::PPYOLOE](./classfastdeploy_1_1vision_1_1detection_1_1PPYOLOE.html) | [C++](./)/[Python](./) |
+| image classification | PaddleClassification serials | [fastdeploy::vision::classification::PaddleClasModel](./classfastdeploy_1_1vision_1_1classification_1_1PaddleClasModel.html) | [C++](./)/[Python](./) |
+| semantic segmentation | PaddleSegmentation serials | [fastdeploy::vision::classification::PaddleSegModel](./classfastdeploy_1_1vision_1_1segmentation_1_1PaddleSegModel.html) | [C++](./)/[Python](./) |
diff --git a/docs/api_docs/python/semantic_segmentation.md b/docs/api_docs/python/semantic_segmentation.md
index da24285e3..dd9a2a5ff 100644
--- a/docs/api_docs/python/semantic_segmentation.md
+++ b/docs/api_docs/python/semantic_segmentation.md
@@ -1,3 +1,9 @@
 # Semantic Segmentation API
 
-comming soon...
+## fastdeploy.vision.segmentation.PaddleSegModel
+
+```{eval-rst}
+.. autoclass:: fastdeploy.vision.segmentation.PaddleSegModel
+    :members:
+    :inherited-members:
+```
diff --git a/fastdeploy/vision/classification/ppcls/model.h b/fastdeploy/vision/classification/ppcls/model.h
index e3082bc2f..dc0d7452b 100644
--- a/fastdeploy/vision/classification/ppcls/model.h
+++ b/fastdeploy/vision/classification/ppcls/model.h
@@ -19,17 +19,37 @@
 
 namespace fastdeploy {
 namespace vision {
+/** \brief All classification model APIs are defined inside this namespace
+ *
+ */
 namespace classification {
-
+/*! @brief PaddleClas serials model object used when to load a PaddleClas model exported by PaddleClas repository
+ */
 class FASTDEPLOY_DECL PaddleClasModel : public FastDeployModel {
  public:
+  /** \brief Set path of model file and configuration file, and the configuration of runtime
+   *
+   * \param[in] model_file Path of model file, e.g resnet/model.pdmodel
+   * \param[in] params_file Path of parameter file, e.g resnet/model.pdiparams, if the model format is ONNX, this parameter will be ignored
+   * \param[in] config_file Path of configuration file for deployment, e.g resnet/infer_cfg.yml
+   * \param[in] custom_option RuntimeOption for inference, the default will use cpu, and choose the backend defined in `valid_cpu_backends`
+   * \param[in] model_format Model format of the loaded model, default is Paddle format
+   */
   PaddleClasModel(const std::string& model_file, const std::string& params_file,
                   const std::string& config_file,
                   const RuntimeOption& custom_option = RuntimeOption(),
                   const ModelFormat& model_format = ModelFormat::PADDLE);
 
+  /// Get model's name
   virtual std::string ModelName() const { return "PaddleClas/Model"; }
 
+  /** \brief Predict the classification result for an input image
+   *
+   * \param[in] im The input image data, comes from cv::imread()
+   * \param[in] result The output classification result will be writen to this structure
+   * \param[in] topk (int)The topk result by the classify confidence score, default 1
+   * \return true if the prediction successed, otherwise false
+   */
   // TODO(jiangjiajun) Batch is on the way
   virtual bool Predict(cv::Mat* im, ClassifyResult* result, int topk = 1);
 
diff --git a/fastdeploy/vision/segmentation/ppseg/model.cc b/fastdeploy/vision/segmentation/ppseg/model.cc
index 8c23253c3..9622ab56c 100644
--- a/fastdeploy/vision/segmentation/ppseg/model.cc
+++ b/fastdeploy/vision/segmentation/ppseg/model.cc
@@ -1,3 +1,17 @@
+// Copyright (c) 2022 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 "fastdeploy/vision/segmentation/ppseg/model.h"
 #include "fastdeploy/vision.h"
 #include "fastdeploy/vision/utils/utils.h"
diff --git a/fastdeploy/vision/segmentation/ppseg/model.h b/fastdeploy/vision/segmentation/ppseg/model.h
index 35477ac5a..c81eebc41 100644
--- a/fastdeploy/vision/segmentation/ppseg/model.h
+++ b/fastdeploy/vision/segmentation/ppseg/model.h
@@ -1,3 +1,17 @@
+// Copyright (c) 2022 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 "fastdeploy/fastdeploy_model.h"
 #include "fastdeploy/vision/common/processors/transform.h"
@@ -5,21 +19,45 @@
 
 namespace fastdeploy {
 namespace vision {
+/** \brief All segmentation model APIs are defined inside this namespace
+ *
+ */
 namespace segmentation {
 
+/*! @brief PaddleSeg serials model object used when to load a PaddleSeg model exported by PaddleSeg repository
+ */
 class FASTDEPLOY_DECL PaddleSegModel : public FastDeployModel {
  public:
+  /** \brief Set path of model file and configuration file, and the configuration of runtime
+   *
+   * \param[in] model_file Path of model file, e.g unet/model.pdmodel
+   * \param[in] params_file Path of parameter file, e.g unet/model.pdiparams, if the model format is ONNX, this parameter will be ignored
+   * \param[in] config_file Path of configuration file for deployment, e.g unet/deploy.yml
+   * \param[in] custom_option RuntimeOption for inference, the default will use cpu, and choose the backend defined in `valid_cpu_backends`
+   * \param[in] model_format Model format of the loaded model, default is Paddle format
+   */
   PaddleSegModel(const std::string& model_file, const std::string& params_file,
                  const std::string& config_file,
                  const RuntimeOption& custom_option = RuntimeOption(),
                  const ModelFormat& model_format = ModelFormat::PADDLE);
 
+  /// Get model's name
   std::string ModelName() const { return "PaddleSeg"; }
 
+  /** \brief Predict the segmentation result for an input image
+   *
+   * \param[in] im The input image data, comes from cv::imread()
+   * \param[in] result The output segmentation result will be writen to this structure
+   * \return true if the segmentation prediction successed, otherwise false
+   */
   virtual bool Predict(cv::Mat* im, SegmentationResult* result);
 
+  /** \brief Whether applying softmax operator in the postprocess, default value is false
+   */
   bool apply_softmax = false;
 
+  /** \brief For PP-HumanSeg model, set true if the input image is vertical image(height > width), default value is false
+   */
   bool is_vertical_screen = false;
 
  private:
diff --git a/python/fastdeploy/vision/segmentation/ppseg/__init__.py b/python/fastdeploy/vision/segmentation/ppseg/__init__.py
index 9a3a5b577..c7d2de3d1 100644
--- a/python/fastdeploy/vision/segmentation/ppseg/__init__.py
+++ b/python/fastdeploy/vision/segmentation/ppseg/__init__.py
@@ -25,6 +25,14 @@ class PaddleSegModel(FastDeployModel):
                  config_file,
                  runtime_option=None,
                  model_format=ModelFormat.PADDLE):
+        """Load a image segmentation model exported by PaddleSeg.
+
+        :param model_file: (str)Path of model file, e.g unet/model.pdmodel
+        :param params_file: (str)Path of parameters file, e.g unet/model.pdiparams, if the model_fomat is ModelFormat.ONNX, this param will be ignored, can be set as empty string
+        :param config_file: (str) Path of configuration file for deploy, e.g unet/deploy.yml
+        :param runtime_option: (fastdeploy.RuntimeOption)RuntimeOption for inference this model, if it's None, will use the default backend on CPU
+        :param model_format: (fastdeploy.ModelForamt)Model format of the loaded model
+        """
         super(PaddleSegModel, self).__init__(runtime_option)
 
         assert model_format == ModelFormat.PADDLE, "PaddleSeg only support model format of ModelFormat.Paddle now."
@@ -34,14 +42,27 @@ class PaddleSegModel(FastDeployModel):
         assert self.initialized, "PaddleSeg model initialize failed."
 
     def predict(self, input_image):
+        """Predict the segmentation result for an input image
+
+        :param im: (numpy.ndarray)The input image data, 3-D array with layout HWC, BGR format
+        :return: SegmentationResult
+        """
         return self._model.predict(input_image)
 
     @property
     def apply_softmax(self):
+        """Atrribute of PaddleSeg model. Stating Whether applying softmax operator in the postprocess, default value is False
+
+        :return: value of apply_softmax(bool)
+        """
         return self._model.apply_softmax
 
     @apply_softmax.setter
     def apply_softmax(self, value):
+        """Set attribute apply_softmax of PaddleSeg model.
+
+        :param value: (bool)The value to set apply_softmax
+        """
         assert isinstance(
             value,
             bool), "The value to set `apply_softmax` must be type of bool."
@@ -49,10 +70,18 @@ class PaddleSegModel(FastDeployModel):
 
     @property
     def is_vertical_screen(self):
+        """Atrribute of PP-HumanSeg model. Stating Whether the input image is vertical image(height > width), default value is False
+
+        :return: value of is_vertical_screen(bool)
+        """
         return self._model.is_vertical_screen
 
     @is_vertical_screen.setter
     def is_vertical_screen(self, value):
+        """Set attribute is_vertical_screen of PP-HumanSeg model.
+
+        :param value: (bool)The value to set is_vertical_screen
+        """
         assert isinstance(
             value,
             bool), "The value to set `is_vertical_screen` must be type of bool."