The “research on the volt-ampere characteristics of diodes"is one of the important experiments incollege physics experiments. The volt-ampere characteristic curve of diode is generally measured byvoltammetry.During the experiment,the volt-ampere characteristic curve of diode should be drawn by using themeasured voltage drop across the diode and the measured current flowing through the diode.The quick drawingof the volt-ampere characteristic curve is very important for enhancing the teaching efficiency. Based onJavaScript,we write drawing program which can provide college students with web quick drawing client.Thecollege students can enter the measured data in the drawing client through the mobile browser. And the drawingprogram would give the volt-ampere characteristic curve. The introduction of web quick drawing program in theteaching process of " research on the volt-ampere characteristics of diodes" can significantly improve thelearning efficiency of the college students and the teaching efficiency of the teachers.