In the perspective of administrative law, public rental system embodied in the implementation of a public policy to adhere to the chief logic series. System analysis, as a frame of reference, environment through cognitive objective, clear value orientation, select the specific mode of supply and action system analysis can be found, for the purpose of the general welfare of the public supply of rental and special benefits administration benefits, creating urban development the flow of living space, and thus meet the development needs of the citizens is the real efforts to achieve public rental system into a welfare Mistakes to avoid access and withdrawal mechanism. Ultimately, the legitimacy of public rental system in the logic of the rule of administrative law system needs a scientific, democratic, law-based administration and other factors common support.