With the advent of the big data age, network forum data which is social, randomness and decentralized is explod-ing and difficult to be used directly. Forum topic mining can refine the main forum argument yet. It can identify the con-tent of the user's discussion from the complex forum data and extract the theme. This paper describes the problem and the framework of the forum topic mining, and classifies of existing technologies, basic types as forum text preprocessing, topic mining algorithm and topic modeling. Then, the basic characteristics and typical methods of the above three kinds of to...
