Based on the supply and demand segmentation of Health Care Market, the government role and its contributions have been elaborated by using the theory of Welfare Economics. The fact that the government intervention occurs is that the market segment is distinguished by its market failure, and intervention itself depends on the accessibility of health-related information. Targeted interven-tion and niche service delivery can effectively adjust the loss of welfare. It reveals that universal coverage access as well as the maxi-mized social service benefits from the health welfare, which represents the applicability of government intervention in positive way.%将医疗卫生进行供、需市场细分,运用福利经济学框架阐述政府在医疗卫生市场当中的作用,可以明确:当细分市场以市场失灵为特征时,存在着政府干预市场的余地;政府干预的广度和深度取决于政府对医疗信息的可获得性;有针对性地进行干预和服务提供,是对福利矫正的有效方式;其适用性在于医疗服务的公平享有以及医疗福利社会收益的最大化。
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