Online brand community plays an important role for enterprises in marketing activities to create brand value. To establish a SEM，it is observed that mobile internet users as consumers perceive the usefulness and interactivity of online brand community better when they perceive more easily to use it in the context of mobile internet. Moreover，when the mobile Internet users have perceived highter level of usefulness and interactivity，they are more satisfied with the brand community. In addition，the level of satisfaction promotes their identification and commitment to the brand community. This paper is not only to enrich the theoretical studies of onle brand community，but also provide implications for enterprises to develop effective brand marketing activities.