Abstract: The theory of public goods is the classic theme and the corestone of public choice theory economics.In the 1970s,20century in westen countries,there incurred many market supply modes of quasi-public goods which give us some useful experience for reference : it can be supplied by market,and also can be provided by the government s guide to promote private voluntary provision or contribution.Since it has been studied on market provision,but there is a long way on this study,so in this paper I will give a theo...