Abstract:On the basis of summarizing the operation and maintenance mode of non-public infrastructures in sponge cities, the chain double-principal agent relationship between the main stakeholders during the operation stage of the sponge infrastructures is analyzed. By introducing the theories of fairness preference and contextual performance, the traditional H-M model is improved, and the incentive model for the operation and maintenance of non-public sponge infrastructures is established and solved. The results show that: (1) The incentive level of the contract and the dependency coefficient of the owner are the dynamic influencing factors for the stakeholders. (2) From the perspective of fairness, the optimal incentive coefficient β∗ is determined by the game between the government and the owner. Accordingly, a set of incentive mechanism is designed from the perspective of the government, including incentive mode and incentive level, and a simulation example is given.