The wide application of Information and Communication Technologies offers great opportunities for the innovation of education, especially in universities. There are varieties of resources on the Internet, which teachers can use for their teaching, assimilating into the curriculum and into teaching methods. Based on constructivism learning theory, this paper centers on the advantages of practicing the web-based instruction by comparison to the traditional one. The media centers, a web-based learning enviroment, has been set up for students to learn as a platform for their after-class review, for their individulized instruction, for their collaborative learning and for exchanging educational resources among teachers. The notes of the Internet-assisting instruction is also discussed to emphasize that the new instruction is a useful complement not replacement to conventional teaching. So it is pointed out that the Internet should become a necessary supplementary for teaching and learning in university as the input resources and the output tools.