Abstract: This paper analyzes the definition of a moderate universalfavored social welfare system, and suggests that it is a social welfare process which can be realized in the stage from a welloff society to the mid 21st century society. The universal here means to establish a welfare system that all citizens can enjoy and moderate refers to the construction of China's social welfare which can be divided into several stages. It shows that according to China's total population and changes in economic and social development and estimation of the level of economic development, the process can be divided into three stages by 2020, 2030 and 2050 as time nodes, and ultimately a moderate universal social welfare system is built up. This is in consistency with the level of economic development, national pride, social democracy, material and technical conditions.