diff --git a/deploy/cpp/include/paddlex/results.h b/deploy/cpp/include/paddlex/results.h
index 1643c9249e8e8e993017c7702d1d490352c2d9a8..72caa1f5d4f78275ca9c4de55aa89bc22edd02e5 100644
--- a/deploy/cpp/include/paddlex/results.h
+++ b/deploy/cpp/include/paddlex/results.h
@@ -20,9 +20,15 @@
 
 namespace PaddleX {
 
+/*
+ * @brief
+ * This class represents mask in instance segmentation tasks.
+ * */
 template <class T>
 struct Mask {
+  // raw data of mask
   std::vector<T> data;
+  // the shape of mask
   std::vector<int> shape;
   void clear() {
     data.clear();
@@ -30,19 +36,34 @@ struct Mask {
   }
 };
 
+/*
+ * @brief 
+ * This class represents target box in detection or instance segmentation tasks.
+ * */
 struct Box {
   int category_id;
+  // category label this box belongs to
   std::string category;
+  // confidence score
   float score;
   std::vector<float> coordinate;
   Mask<float> mask;
 };
 
+/*
+ * @brief
+ * This class is prediction result based class.
+ * */
 class BaseResult {
  public:
+  // model type
   std::string type = "base";
 };
 
+/*
+ * @brief
+ * This class represent classification result.
+ * */
 class ClsResult : public BaseResult {
  public:
   int category_id;
@@ -51,17 +72,28 @@ class ClsResult : public BaseResult {
   std::string type = "cls";
 };
 
+/*
+ * @brief
+ * This class represent detection or instance segmentation result.
+ * */
 class DetResult : public BaseResult {
  public:
+  // target boxes
   std::vector<Box> boxes;
   int mask_resolution;
   std::string type = "det";
   void clear() { boxes.clear(); }
 };
 
+/*
+ * @brief
+ * This class represent segmentation result.
+ * */
 class SegResult : public BaseResult {
  public:
+  // represent label of each pixel on image matrix
   Mask<int64_t> label_map;
+  // represent score of each pixel on image matrix
   Mask<float> score_map;
   std::string type = "seg";
   void clear() {