Abstract: In this paper, the insufficiency of current city power grid assessment system in China is pointed out. Through analyzing and comparing the assessment theory and method of power grid in world metropolitan cities, the integrated assessment system of our countrys metropolitan cities is built. The system is based on reliability, security, efficiency and other traditional evaluation modules of power grid. By merging economic and environmental factors, the external effect of the metropolitan power grid operation is considered synthetically in the system. By combining the merit of analytic hierarchy process (AHP) and the information entropy theory, the overall quality evaluation of the metropolitan power grid is realized based on the analytic hierarchy process and the entropy methods. This index system and the evaluation model can conveniently carry on the analysis and the evaluation of the metropolitan power grid in China, which provides the auxiliary ways for the city power grid plan and safe operation. In the end, the rationality and applicability of this index system and evaluation model are verified with the examples of power grids in several metropolitan cities.