The WWW application model based on the internet as a convenient and rapid means of sharing information is popular with users. The users view multimedia teaching contents by accessing hypertext pages, and execute free explore learning by clicking hyperlinks. However, the teaching based only on the hypertext pages has many shortcomings. The computer-assisted teaching software described by this paper overcomes the many shortcomings. The software is achieved by J + + and consists of the server section, the students section, the teaching section by the teachers, the courseware maintenance section.