The Review of Recommendation System.

With the development of the Internet, the amount of information continues to increase, and the problem of “information overloading” is becoming more and more obvious. Simple information retrieval can no longer satisfies the needs of users to search for accurate information, and the recommendation system emerges. Although the recommendation system is widely used in e-commerce, the recommended algorithm faces more difficulties. The paper firstly introduces the related concepts, the directions of application and the principles of the recommendation system, then the paper analyzes the advantages and disadvantages of these algorithms. Finally, it summarizes some main problems and the directions of the research the recommendation system needs to solve.