diff --git a/docs/source_en/constraints_on_network_construction.md b/docs/source_en/constraints_on_network_construction.md
index 3a7e3f07dfad4d7b45d87af476a220b7db27e49e..8530f2c890952f12928414847eab5d1a0694213d 100644
--- a/docs/source_en/constraints_on_network_construction.md
+++ b/docs/source_en/constraints_on_network_construction.md
@@ -9,7 +9,7 @@
     - [MindSpore Extended Data Type](#mindspore-extended-data-type)
     - [Expression Types](#expression-types)
     - [Statement Types](#statement-types)
-    - [System Functions](#system-functions)
+    - [System Functions/Class](#system-functionsclasses)
     - [Function Parameters](#function-parameters)
     - [Operators](#operators)
     - [Index operation](#index-operation)
@@ -63,7 +63,7 @@
 | `not in`     | Only support Dictionary.
 | Assignment statement     | Accessed multiple subscripts of lists and dictionaries cannot be used as l-value.
 
-### System Functions/Class
+### System Functions/Classes
 
 | Functions/Class         | Compared with Python
 | :----------- |:--------
diff --git a/docs/source_en/operator_list.md b/docs/source_en/operator_list.md
index 4062da3fcc5d611fe5b0289998998ffe0a20c972..88d722d66d75016cebeac1167d7af935b6b9f6ac 100644
--- a/docs/source_en/operator_list.md
+++ b/docs/source_en/operator_list.md
@@ -5,6 +5,7 @@
 - [Operator List](#operator-list)
     - [mindspore.nn](#mindsporenn)
     - [mindspore.ops.operations](#mindsporeopsoperations)
+    - [Implicit Type Conversion](#implicit-type-conversion)
 
 <!-- /TOC -->
 
@@ -330,3 +331,54 @@
 | [mindspore.ops.operations.ScalarCast](https://www.mindspore.cn/api/en/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ScalarCast)                       |    Supported |   Supported  |   Supported | inner_ops
 | [mindspore.ops.operations.ReverseSequence](https://www.mindspore.cn/api/en/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ReverseSequence)             |    Supported  | Doing  | Doing | array_ops
 | [mindspore.ops.operations.CropAndResize](https://www.mindspore.cn/api/en/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.CropAndResize)                 |    Supported  | Doing  | Doing | image_ops
+
+## Implicit Type Conversion
+### conversion rules
+* Scalar and Tensor operations: during operation, the scalar is automatically converted to Tensor, and the data type is consistent with the Tensor data type involved in the operation;
+when Tensor is a bool data type and the scalar is int or float, both the scalar and Tensor are converted to the Tensor with the data type of int32 or float32.
+* Tensor operation of different data types: the priority of data type is bool < uint8 < int8 < int16 < int32 < int64 < float16 < float32 <float64,
+during the operation, first determine the data type with the relatively highest priority among the Tensors involved in the operation, and then convert the low priority data type Tensor to the relatively highest priority data type;
+when the Tensor of int8 and uint8 data types are operated, they are converted to int16 Tensor.
+* Data type conversion of Parameter is not supported: If inferred according to the conversion rules, RuntimeError exception will be thrown when the data type conversion of Parameter defined in the network is required.
+
+### data types involved in conversion
+* bool
+* int8
+* uint8
+* int16
+* int32
+* int64
+* float16
+* float32
+* float64
+   
+### support ops
+| op name
+| :-----------
+| [mindspore.ops.operations.BitwiseAnd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseAnd)
+| [mindspore.ops.operations.BitwiseOr](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseOr)
+| [mindspore.ops.operations.BitwiseXor](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseXor)
+| [mindspore.ops.operations.TensorAdd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TensorAdd)
+| [mindspore.ops.operations.Sub](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Sub)
+| [mindspore.ops.operations.Mul](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Mul)
+| [mindspore.ops.operations.Pow](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Pow)
+| [mindspore.ops.operations.Minimum](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Minimum)
+| [mindspore.ops.operations.Maximum](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Maximum)
+| [mindspore.ops.operations.RealDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.RealDiv)
+| [mindspore.ops.operations.Div](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Div)
+| [mindspore.ops.operations.DivNoNan](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.DivNoNan)
+| [mindspore.ops.operations.FloorDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.FloorDiv)
+| [mindspore.ops.operations.TruncateDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TruncateDiv)
+| [mindspore.ops.operations.TruncateMod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TruncateMod)
+| [mindspore.ops.operations.Mod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Mod)
+| [mindspore.ops.operations.FloorMod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.FloorMod)
+| [mindspore.ops.operations.Atan2](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Atan2)
+| [mindspore.ops.operations.Equal](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Equal)
+| [mindspore.ops.operations.ApproximateEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ApproximateEqual)
+| [mindspore.ops.operations.NotEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.NotEqual)
+| [mindspore.ops.operations.Greater](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Greater)
+| [mindspore.ops.operations.GreaterEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.GreaterEqual)
+| [mindspore.ops.operations.Less](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Less)
+| [mindspore.ops.operations.LessEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LessEqual)
+| [mindspore.ops.operations.LogicalAnd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LogicalAnd)
+| [mindspore.ops.operations.LogicalOr](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LogicalOr)
diff --git a/docs/source_zh_cn/constraints_on_network_construction.md b/docs/source_zh_cn/constraints_on_network_construction.md
index a0d03eb67b2fd01b282d59200487a4c3d8eaaebb..c2d0ce3e5a69e9fc15a5ed59dd2c7027bc673b1a 100644
--- a/docs/source_zh_cn/constraints_on_network_construction.md
+++ b/docs/source_zh_cn/constraints_on_network_construction.md
@@ -9,7 +9,7 @@
         - [MindSpore扩展数据类型](#mindspore扩展数据类型)
         - [表达式类型](#表达式类型)
         - [语句类型](#语句类型)
-        - [系统函数](#系统函数)
+        - [系统函数/系统类](#系统函数系统类)
         - [函数参数](#函数参数)
         - [操作符](#操作符)
         - [索引操作](#索引操作)
diff --git a/docs/source_zh_cn/operator_list.md b/docs/source_zh_cn/operator_list.md
index c1c7b9759f984f79a2bedab660ef605da2f67c5d..bf93a84283203b8c1a4f3e9655022fdc641be3bc 100644
--- a/docs/source_zh_cn/operator_list.md
+++ b/docs/source_zh_cn/operator_list.md
@@ -5,6 +5,7 @@
 - [算子支持](#算子支持)
     - [mindspore.nn](#mindsporenn)
     - [mindspore.ops.operations](#mindsporeopsoperations)
+    - [隐式类型转换](#隐式类型转换)
 
 <!-- /TOC -->
 
@@ -330,3 +331,54 @@
 | [mindspore.ops.operations.ScalarCast](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ScalarCast)                       |    Supported |   Supported  |   Supported | inner_ops
 | [mindspore.ops.operations.ReverseSequence](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ReverseSequence)             |    Supported  | Doing  | Doing | array_ops
 | [mindspore.ops.operations.CropAndResize](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.CropAndResize)                 |    Supported  | Doing  | Doing | image_ops
+
+## 隐式类型转换
+### 转换规则
+* 标量与Tensor运算：运算时，将标量自动转为Tensor，数据类型和参与运算的Tensor数据类型保持一致；
+而当Tensor是bool数据类型，标量是int或float时，将标量和Tensor都转为数据类型为int32或float32的Tensor。
+* 不同数据类型Tensor运算：数据类型优先级排序为bool < uint8 < int8 < int16 < int32 < int64 < float16 < float32 < float64，
+运算时，先确定参与运算的Tensor中优先级相对最高的数据类型，然后将低优先级数据类型Tensor转换为相对最高优先级数据类型；
+而当int8和uint8数据类型的Tensor进行运算时，将其都转为int16的Tensor。
+* 不支持对Parameter进行数据类型转换：如果按照转换规则推导，需要对网络中定义的Parameter进行数据类型转换时，会抛出RuntimeError异常。
+
+### 参与转换的数据类型
+* bool
+* int8
+* uint8
+* int16
+* int32
+* int64
+* float16
+* float32
+* float64
+   
+### 支持算子
+| 算子名
+| :-----------
+| [mindspore.ops.operations.BitwiseAnd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseAnd)
+| [mindspore.ops.operations.BitwiseOr](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseOr)
+| [mindspore.ops.operations.BitwiseXor](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.BitwiseXor)
+| [mindspore.ops.operations.TensorAdd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TensorAdd)
+| [mindspore.ops.operations.Sub](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Sub)
+| [mindspore.ops.operations.Mul](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Mul)
+| [mindspore.ops.operations.Pow](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Pow)
+| [mindspore.ops.operations.Minimum](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Minimum)
+| [mindspore.ops.operations.Maximum](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Maximum)
+| [mindspore.ops.operations.RealDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.RealDiv)
+| [mindspore.ops.operations.Div](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Div)
+| [mindspore.ops.operations.DivNoNan](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.DivNoNan)
+| [mindspore.ops.operations.FloorDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.FloorDiv)
+| [mindspore.ops.operations.TruncateDiv](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TruncateDiv)
+| [mindspore.ops.operations.TruncateMod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.TruncateMod)
+| [mindspore.ops.operations.Mod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Mod)
+| [mindspore.ops.operations.FloorMod](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.FloorMod)
+| [mindspore.ops.operations.Atan2](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Atan2)
+| [mindspore.ops.operations.Equal](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Equal)
+| [mindspore.ops.operations.ApproximateEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.ApproximateEqual)
+| [mindspore.ops.operations.NotEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.NotEqual)
+| [mindspore.ops.operations.Greater](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Greater)
+| [mindspore.ops.operations.GreaterEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.GreaterEqual)
+| [mindspore.ops.operations.Less](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.Less)
+| [mindspore.ops.operations.LessEqual](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LessEqual)
+| [mindspore.ops.operations.LogicalAnd](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LogicalAnd)
+| [mindspore.ops.operations.LogicalOr](https://www.mindspore.cn/api/zh-CN/master/api/python/mindspore/mindspore.ops.operations.html#mindspore.ops.operations.LogicalOr)