This paper have researched the environmental economics analysis methodology about the environmental benefits of cogeneration and analyzed the emissions benefits and other environmental benefits of cogeneration using cost benefit analysis methodology. 就热电联产的环境效益进行了环境经济学分析方法研究,利用成本效益分析方法对热电联产的排放效益和其他环境效益进行了分析探讨。