A fuzzy comprehensive evaluation model based on AHP is proposed to enhance the evaluation work, improve the level of company's management and reduce unnecessary duplication works. In this paper we firstly design a general internal evaluation index system according to the evaluation objects, as well as standards and processes. Then, it uses AHP to determine the weight of each index item, creates a dynamic evaluation model with fuzzy comprehensive evaluation method. Finally it develops an intelligent comprehensive evaluation system, as an effective complement to other business systems in power enterprise that provides a full range of automatic support to the appraisal management for the internal departments.