The purposes of this study are to examine the factors influencing the user satisfaction of knowledge management system(KMS) and the influence of the user satisfaction on the performance, and to search the strategies for effective KMS operating. The results of covariance structural analyses indicate that the factors-knowledge quality and KMS quality significantly influence the user satisfaction. User satisfaction also significantly affects the performance. Based on the results, this study discusses the potential implications for the strategies of KMS implementing to improve the user satisfaction and performance.