In order to study the evolution mechanism and forecast the development direction of green building market, this paper establishes a model of asymmetric evolutionary game in the green building market by using the idea of evolutionary game firstly. Then the dynamic equations of the two strategies are set up by using the idea of "replicator dynamics" in evolution game. Lastly the evolutionary game equilibrium model is established. The analysis results show that (build green, buy green),(build non green, buy non green) are the two evolutionary stable situations. Through the empirical analysis, the development of green building in our country is divided into three development stages. And through analyzing the evolution characteristics of each stage, the evolution mechanism and development trend of green building in our country are obtained.