Community website's success often depends on whether community members are willing to share personal knowledge and experience on the website. Community members' perception of the relationship quality is also the main reasons why the community members are willing to stay in the website. In this study, we take the most famous social network Mahjong game as an example to explore the influence of social networking website quality and information sharing intention on website users' loyalty. The results of this study are positive and can provide the social networking managers business advices.