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In order to improve quality of service (QoS) of wireless environment in scene-based mobile social network service (mobile SNS), a novel prefetching method is proposed in this paper. Utilizing this method, prefetching decisions are made based on the relationship among users and access histories recorded in the client. When the user is viewing the scene or other components, client is allowed to prefetch scenes from the server that the user will potentially access soon. Experiment has been done on a prototype called scene life system developed by us. The results show that the proposed method can significantly reduce scene access time, and then provide better QoS.