PM2.5 existed in smog air seriously threatens the survival of Chinese citizens and triggers the high concern and discussions by all Chinese. The deep problem hidden at the behind of PM2.5 should be thought from the perspective of public administration. The emerging multicenter power theory opens a new road for the governance of “tragedy of the commons” and demonstrates its advantages being difficultly covered by single center power theory. The institutional guarantee for using multicenter governance model to solve PM2.5 problem is discussed from such three dimensions as institutional establishment, interactive supervision and reliable promise, the multicenter treatment framework for PM2.5 problem is heuristically put forward, and the real solving measures are advanced. 