Mobile community enhance participants to socialize at any time, provide participants to make self-presentation strategies and build online image. In response to the development of the mobile community and participants' social motivation, self-presentation strategies, we explore the social motivation of mobile community participants and self-presentation strategies. This study used Internet questionnaires to collect data. There are 578 valid questionnaires. The results show that: (1) There is a high significant relationship between "build relationship", "maintain relationship", "belonging", "need for popularity" and "ingratiate strategy", "self-enhancement strategy", "supplication strategy", "assistance strategy"; (2) There is a moderate significant relationship between "belonging" and "supplication strategy";(3) There is a moderate significant relationship between "maintain relationship", "belonging" and "ingratiate strategy".