In order to solve the problems such as untimely policy learning, lack of responsibility awareness, lagging performance behavior and insignificant performance results of the member units of China's Electric Power Market Management Committee when performing their duties, improve the operation efficiency of Electric Power Market Management Committee, and promote the sustainable development of the electric power market, the method of combining analytic hierarchy process with fuzzy comprehensive evaluation is adopted. This paper constructs and applies the performance evaluation system of member units of Electric Power Market Management Committee from the four dimensions of performance policy, performance ability, performance behavior and performance effectiveness, analyzes the performance level of member units of a provincial Electric Power Market Management Committee, and puts forward suggestions for relevant departments to improve the construction of performance evaluation system of member units, strengthen the sense of responsibility of member units, and improve China's electric power market supervision system.