Abstract：The realization of public interest concerns the vital interests of each social member and social harmony. However, because of its dynamic, hierarchical and ambiguous nature, we can't give a clear definition in theory, nor can in the practice of public policy. In view of this, through the analysis of the concept of public interest, this paper points out its definition requires improving laws and citizen participation. From the perspective of government-public relation, effective cooperation of government and citizen is not only the requirement of the system, but also the necessary approach to the definition and realization of public interest.

Keyword：public interest;citizen participation;corporation;