Fourier transform knowledge is always difficult to be understood because of high abstract characteristics in the signals and systems. It is realized for the visualization of various operations by the powerfully signal processing functions of MATLAB based on the content of Fourier transform, Fourier series and convolution theorem. The concept of time and frequency domains and the analysis method are deeply understood by MATLAB programming.%针对信号与系统中傅里叶变换具有抽象度高、难于理解的特点，利用MATLAB强大的信号处理功能，结合傅里叶变换、傅里叶级数、卷积定理的内容，通过MATLAB程序设计实现傅里叶变换中各种运算的直观演示。通过MATLAB编程加深对信号时域和频域概念、分析方法的理解。
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