Based on the three different relationships between investment demand and the investment capacity of the gov- ernment,the paper constructed three game models between the government and the private investor.Through the analy- sis of the models,the motive,action and effect of the players in the quasi-public goods field are expounded systemical- ly.The paper argues that to develop a win-win structure for both of the benefits of social and private,the government should play a dominant role in the game,and the favorable policies should be utilized timely and measurably.