The purpose of this study is to explore, from Social Security Reform in 1945 to present, the evolutions social welfare policies in France and their characteristics. The aspect with which this study is concerned is that of change of state role and the responses to new social risks. The following points were found through this study. First, as time passes, the state role has increased on the side of administration and funding of social welfare in France. Especially, ons of the philosophy of social security reform in 1945 was, based on social democracy, autonomous management by insured persons in social insurance. For it, members of social insurance fund committee are composed by the direct election on which insured persons have participated. However, from the mid-1990s, the method of its composition han changed definitely into designation by the representative organization of the employer and the worker. In addition, the state has increased son power in social insurance funding by the creation of purposive tax as CSG and CRDS and the parliament's control on the fiscal balance of social security. Second, to the difference of social insurance, the decentralization was dominant in the domain of social assistance and social service (in french action sociale). This phenomenon has began to appear during the socialist government in the first half of 1980. Third and finally, this study has found the implementation of the new policies concerned with the responses to new social risks, especially poverty and social exclusion. In 2000, the CMU has been introduced to protect persons who were excluded from the coverage of health insurance. the rSa, in 2009, has the purpose of overcoming the poverty and social exclusion problem by introducing the concept "workfare" which is dominant in contemporary welfare states. Considering that Korea's welfare state is faced with dual challenges, namely coping not only the traditional social risks but also the new social risks, this case research gives us many lessons.