The service efficiency of the business hall reflects the utilization efficiency and service capacity of the business hall of the power industry. Through the service data, business hall and busness data, which accumulated in the power customer service process of a provincial power company, a business hall performance evaluation model based on entropy weight method and analytic hierarchy process is proposed. The model has a rigorous threelevel index device, which is incrementally added from the cost, service scope and substitutability, and complements each other, thus achieves an additional weight performance evaluation system. The establishment of the business performance evaluation system can objectively reflect the efficiency of the business hall and the quality of service from the perspective of users. It has a strong practical significance for optimizing the distribution of business halls and integrating lowefficiency business halls.