diff --git a/README.md b/README.md
index af33a6f..93688b1 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,96 @@
-# Hydrostatic-Bearing-Designer
\ No newline at end of file
+# Hydrostaic Bearing Designer 
+
+
+## About
+
+
+_Hydrostaic Bearing Designer_ is an app for hydrostatic bearing parameter calculation, stiffness performance prediction, spindle error motion test, and digital twin demonstration. By providing a truly easy to use app for hydrostatic bearing design, makes _Hydrostatic Bearing Designer_ an ideal tool for students in  Course _Precision Machine Design_ learning Hydrostatic bearing, Spindle error motion, and Digital twin in a simple and convenient way.
+
+
+
+## System Requirements
+
+
+_Hydrostatic Bearing Designer_ is expected to work with MATLAB R2022a or above. 
+
+
+## MATLAB® Toolbox Installation
+
+Follow the steps below to install _Hydrostatic Bearing Designer_ as a MATLAB® toolbox
+
+1) Download the
+   [Hydrostatic Bearing Designer.mlappinstall](https://github.com/precise-simulation/featool-multiphysics/releases/latest/download/FEATool_Multiphysics.mlappinstall)
+   toolbox installation file.
+
+2) Then start MATLAB®, press the **APPS** toolbar button,
+   and select the **Install App** button.
+
+3) When prompted to choose a toolbox file to install, select the
+   **Hydrostatic Bearing Designer.mlappinstall** file and press **OK**.
+
+4) Press the **Install** button if prompted to _"Install to My Apps"_.
+
+![](https://hackmd.io/_uploads/BJCKSpBt2.png)
+
+
+Once the toolbox has been installed, an app icon will be available in
+the _APPS_ toolbar to start the _Hydrostatic Bearing Designer_ GUI. (Note that MATLAB® may
+not show or give any indication of the toolbox installation progress
+or completion.)
+
+
+## Tutorials
+
+The app can be divided into two sections: Hydrostatic bearing design and spindle error motion.
+
+![](https://hackmd.io/_uploads/SJXTdaHYh.png)
+
+
+### Hydrostatic bearing design
+
+1. Input the oil specification, restrictor size, and bearing size, and the parameters related to the machine will be generated.
+
+![](https://hackmd.io/_uploads/HJe4YpBYh.png)
+
+2. Check bearing performance to decide wheather it meets our need.
+
+![](https://hackmd.io/_uploads/S1dEh6SFh.png)
+
+
+### Spindle error motion
+
+1. Read the data from dual ball bar experiment.
+
+![](https://hackmd.io/_uploads/ryd5naHK3.png)
+
+2. Check the spindle error motion performance of the real hydrostatic spindle.
+
+![](https://hackmd.io/_uploads/ByIxTpSYn.png)
+
+3. Display the virtual model of the real machine spindle and calculate the suspected oil film thickness.
+
+>**Note**
+>The CAD model demonstrates how digital twin will work, however it's not synchornized with the real machine model.
+
+![](https://hackmd.io/_uploads/Hk4U6aSY2.png)
+
+
+
+## Built With
+
+* [MATLAB/App Designer](https://www.mathworks.com/products/matlab/app-designer.html) - App designer that contains GUI and app behavior.
+
+## Authors
+
+* WeiChu (Wilson) Chen
+
+## License
+
+(C) Copyright 1994-2023 The MathWorks, Inc.
+
+* This project is licensed under the MIT License - see the [LICENSE.md](LICENSE.md) file for details
+
+## Acknowledgments
+
+* The writing format of this README file is based on the reference of FEATool.
+* Big thanks to Cindy Hsieh for being my teammate and working together with me to organize experimental data and test software.
\ No newline at end of file