This is a comparative study of the policies for promoting new energy automobiles in Beijing, Shanghai, and Guangzhou based on analytic hierarchy process (AHP) in four dimensions: subsidies, installation of charging infrastructure, traffic control, and government procurement. In a quantified research, we find that the weight of policies for installation of charging infrastructure is maximum and that of subsidy policies is minimum. Problems exist in the policies for promoting new energy in China, including too many subsidies, unreasonable design of subsidy policies, rough policies of government procurement, and lack of coerciveness. Suggestions are made for solving these problems.