The research of personalized Active information Service has made a big progress during these years, the most important of which is personalized information recommendation.

近年来，个性化主动信息服务的研究取得了很大的进展。而在个性化主动信息服务中最重要的服务就是个性化信息推荐。

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So this paper presents the recommendation system into the E-learning platform, in order to accomplish the purpose of personalized service.

协同推荐技术是实现个性化推荐系统的一种有效方法。

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