The contradiction between rapid urban development and the quality and coverage of social welfare system is a crucial factor constraining the sustainable development of cities and the attraction of professional immigrants.Social welfare system is the key component in the transition to a civil society which has undergone in China.The shortage and imbalance of high quality health and education system, which is the basic demand to form a stable mid-class, will largely impede the process of urban development and urbanization.The paper, based on international policy studies, has explored the objectives, strategies, governance and financing of health and education system of mega-cities. <<