Recently, since the development of internet and online space, people experience new communication space and games different from traditional ones. People share their experiment of games and item in the online space with internet. This paper proposes the design of the MMORPG item’s pricing decision system. First, the on-going “chatting” in the game chatting system is collected by chatting API. This collected chatting is the information including terms of game item. Then, extracted terms of game item are classified on the basis of collective intelligence model and generate a table of weight. At last, this system can recommend suitable MMORPG item to users with the obtained weight table storing as ontology.