The"community of inquiry"framework , proposed by Garrison et al ., has become the most widely used theoretical model in the study of online learning community .This paper elaborates the connotation , index and relationship of the cognitive presence ,the social presence ,and the teaching presence ,as well as the academic dispute about the value of this framework through reviewing the recent development of this framework and the latest research findings .It also explores its guiding significance to on-line teaching practice .It is hoped that teachers should not only design online teaching and develop online teaching material ,but also create virtual learning environment with cognitive ,social and teaching presences to help students experience deep and mean -ingful learning .%Garrison等三位学者提出的“探究式社区”框架已经成为了研究网上学习社区最为广泛采用的理论模型。通过梳理这一框架的发展和最新研究成果，阐述了“探究式社区”理论框架中的认知存在感、社会存在感、教学存在感的内涵、指标、关系，及该框架价值的学术争论，并探讨了该框架对于网络教学实践的指导意义。教师在网络教学设计、开发和制作网络学习材料的同时，应注意为学生营造具有认知存在感、社会存在感、教学存在感的虚拟学习环境，从而让学生获得深入的、有意义的学习体验。
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