With the help of MATLAB Web Server, the unit step response curve of SISO second order linear steady-state system (LTI) is designed for the user to input the capacitance value and capacitance value of the resistance. Angular frequency and resistance ratio of a second-order system on a virtual circuit or Internet client. Through matlabserver's MATLAB Web application, MATLAB draws the unit step response curve of the second-order system under different damping ratios and different angular frequencies, calculates the corresponding performance indicators, and returns the calculated results and curves to the client in HTML format.