Research of intelligent information retrieval system based on three layers agent structure

With the development of Internet, we put forward high requests for information retrieval. First, efficiency; second, personalizing. In this paper a model and an algorithm are proposed which are according to the user´s retrieval habit of learning and the intelligent information retrieval system that has inner relativity of three layers agent structure. This is a trend that using artificial intelligence to enhance the efficiency of information retrieval, which need more research and practice.