As a important intercommunication tool which followed E - mail, BBS and ICQ, people knew the advantage of Blog on intercommurication step by step. In this paper, we will dicuss that using the Blog in undergraduate course to find the way which can solve the question about lack of intercommunication. By using Blog, We expect to increase the frequency of intercommunication among teachers and students,students and students, teachers and teachers,exploit the extension of intercommaaication, advance the levels of intercommunication, and imp...