Abstract: With the characteristic of complexity,abstraction and strong mathematics,the course of Signals and Systems is difficulty to be understood and mastered during lectures.To sulve this problem,based on the Graphical User Interface(GUI)of MATLAB a visualization demo platform is designed.The complete response of LTI system and Fourier transform for simple image processing as an example to demonstrate the application of the platform,and the platform could transform abstract concepts to visualization gra- phical.Thereby,it can help students understand the emphasis and difficulty of the course,improve the efficiency and quality ofteaching,and guide a direction for other related courses in teaching assistant.