In recent years, along with the high-speed development of information technique, complex network has become a growing research field partly as a result of the increas-ing availability of a huge number of networks in the real world. Besides small world effect found by Watts and Strogatz in 1998 and scale-free effect found by Barabasi and Albert in 1999, community(module) structure has been considered to be one of the most important characteristics in complex networks. Until now, there isn't a pre-cise defini...