Abstract: Fossil fuel power generation efficiency of the international comparison is the field of energy efficiency analysis of an important issue. In this paper, a measurement can be used for integrated power generation efficiency of fossil fuels and emission reduction potential of energy-efficient DEA model. The model will be power and heat output as the two different treatment, and taking into account the structure of the fuel consumption differences. Application of the model put forward by 27 OECD countries and China in 2005 integrated the efficiency of fossil-fuel power generation and energy-saving emission reduction potential of a comparative analysis.