With fast changing in the information hi-tech each passing day and flourishing development in the internet, knowledge management seems to constitute a rather big challenge to the enterprises. But on the contrary, it becomes a main topic of debate for their success as well at present and in the future. This research was to explore those documents presented and published by the scholars, home and abroad, to research thoroughly the theory aimed at knowledge management, and to induce some variables affecting the relationship among knowledge management infrastructure, knowledge management capability and organizational performance. The questionnaire was also conducted to investigate staff of power supply branches in Tai power electrical power system. When the data was filled out and inputted the computer item by item, the Structural Equation Modeling was utilized to compile statistics and make analysis of it. To Tai power Company, in exploration of the model of this study, it was found the factors, greatly influencing a company's performance and achievements, in turn was knowledge management infrastructure and knowledge management capability. Apparent to all, the knowledge management infrastructure was a critical element in the enhancement of organizational performance. Thus, one conclusion was drawn in this paper that the urgent matter facing Tai power was how to strengthen his knowledge management infrastructure.