在线健康社区给公众健康信息获取与健康行为带来较大的便利。本文通过问卷调研，一共采集到841个在线健康社区用户的数据，以检验社会临场感和在线健康社区用户满意度的关系以及健康隐私关注的中介作用。研究结果显示，社会临场感（共在意识、心理参与、亲密度和健康知识分享契合度）越强的用户，他们对在线健康社区用户满意度（健康信息满意度、医患关系满意度和病患沟通满意度）就越高，且社会临场感可以通过影响健康隐私关注进而负向影响在线健康社区用户的满意度。本研究立于社会心理学视角，对于在线健康社区用户的媒介心理表征和使用心理状态的关系进行讨论，研究结论不仅有利于在线健康社区的健康发展，对于未来中国健康传播的探索和研究的深入讨论，以及线上医患关系的良性发展都有积极的推动作用。

Online health community has brought greater convenience for public health information acquisition and health behavior. This article has totally collected data of 841 on-line health community users through questionnaire inquiry to check for relationship between social presence and on-line health community users’ satisfaction, inter-mediation of health privacy concerns. The research results have shown that, the users with stronger social presence (coexistence consciousness, psychological participation, intimacy and sharing integration degree of health knowledge) have higher satisfaction (satisfaction on health information, doctor-patient relationship and communication with patients) on on-line health community users, meanwhile social presence could negatively influence satisfaction of on-line health community users through influencing health privacy attention. This research has focused on perspective of social psychology to discuss relationship between medium psychology representation and usage psychology state of on-line health community users. The research conclusion is not only advantageous to healthy development of on-line health community, but also has positive driving effects on exploration of China future health communication, deep discussion of research and benign development of on-line doctor-patient relationship.