Based on the empirical research on BBS virtual communities of the Chinese Muslims website, this paper studied the basic interaction relation types and the characteristics of social networks in virtual communities, and tried to present the distinctive features of social networks in such a special field of cyberspace, thus probe the influences and meanings of the new community type on our society.

In the background of building a harmonious socialist society,we advocate to use the concept of harmony to guide the BBS community governance in universities.

Building method for virtual community trust model;

Through analyzing the forms of virtual communities,the research tries to discuss the advantages and disadvantages of sharing knowledge in virtual communities,and supplies some methods for improving virtual communities.

By analyzing the applications of ICT into higher education and the importance of teachers professional development (TPD), the author puts forward a approach based on virtual communities to TPD at colleges and universities.

The particularities of the internet have changed the traditional mode of human intercourse,forming a new intercourse space——virtual communities,in which people use nicknames and establish a kind of interpersonal communication similar to that in real life.