Geographical migration relationship model and human dynamics model of social network are introduced,"an original network system and two transforming network system" of the former model is shifted to an evolutional process of aboriginality, migration and adaption;"the typical characteristic of social network-higher aggregation and shorter average path length" of the latter model is disintegrated to two types (group type and non group type). These two modles are taken as research method of demographic analysis on mobile communication. The demographic data consists of three population migration indices and four population technical composition indices of provinces in China which against three important mobile communication indices are built to explain the internal relation between demographic factors and mobile communication traffic respectively. The research findings are: geographical migration relationship model has a better performance for describing the impact of population migration in different evolutional stages on mobile communication using, and this impact is completed by keeping the former links and generating new links. The impact of population technical composition factors on mobile communication using is preferably described by using human dynamics model of social network one agent has numerous contacts with same kind agents, but little contact with different kinds of agents. This kind of cont act depents on value, and valuable communication can consititute man-machine interact ion communication.