Abstract: Public service is a hot topic in the whole world.In the period of profound adjustment on China's economic structure,social structure and interest structure,taking public service as protecting the base line of people's livelihood,which is not only an important way to promoting shareable development and social harmony，but also a basic support to responding public needs and civil rights.As an important issue related to national development and social solidarity,public service in contemporary China must be give theoretical provision,demonstrate its occurrence logic,legitimacy and rationality.Therefore,it is necessary to go back to the cultural tradition,institutional environment and realistic situation,comb the generation background of public service issues，interpret the generation logic of public service concepts，construct a conceptual framework oriented to policy issues,thus,reasonably guide public expectations and plan the course of action.

Key words: public service, discourse logic, conceptual interpretation