Abstract: Signal and system is an essential professional basic course of electronic information specialty that connects the preceding and the following in electronic information technology.Grasp the basic concepts and methods which have a very important role for all electronic information engineering students.However,the concept of the course is abstract,the formula is complex and the theory is profound,so it is too difficult to understand.Through the exploration of the visualization method of abstract concepts in the course,this paper designs a graphical user interface using GUI programming technology,which can demonstrate abstract theoretical formulas and concepts more intuitively and vividly.The demonstration system has the features of good interaction,simple operation and strong intuition.The students' interest is greatly stimulated in learning,so that the teaching effect and the teaching quality are highly improved.