中文摘要：

大规模在线开放课程（MOOC）的出现根本性地改变了传统的课堂教学模式。MOOC利用互联网技术使得学生随时随地获取优质课程资源,具有大规模、开放性、成本低廉等特点。然而,目前的MOOC系统存在一系列问题亟待解决：（1）师生交流缺乏实时性;（2）缺乏激励机制;（3）信息过载;（4）缺乏资源共享支持。本文设计了一个面向MOOC的在线课程社区系统,包括实时交互服务、声誉管理机制、社区推荐系统、资源共享框架、以及课程问答系统,有效地解决了MOOC系统目前面临的问题。

英文摘要：

The emergence of MOOC has fundamentally changed the traditional teaching methods. MOOC enables students obtaining high-quality course resources anytime and anywhere using internet technology, which has the characteristics of massive, open and low-cost. However, current MOOC systems have several problems to solve： （1） the lack of real-time interactions between teachers and students; （2）lack of incentive mechanism; （3）information overload; （4）lack of support of resource sharing. This paper designed an online course community system towards MOOC, including real-time interaction service, reputation management mechanism,community recommendation system, resource sharing framework, and course question answering system, which effectively solved the problems faced by current MOOC system.