Abstract: In order to improve the energy utilization and economy, this paper proposed a gas-solar-geothermal integrated energy system optimization operation strategy based on Stackelberg game. The integrated energy system is first modeled. Then, we nest it is nested into the framework of game theory and build the operation optimization model of Stackelberg game. The energy aggregator is considered as the leader while the integrated energy system and users as the followers. Economy, environmental protection and conservation are achieved when each party pursues the optimal goal. Finally, the effectiveness of the proposed method is verified by arithmetic examples, where the aggregator, the energy supply system and the end-user are able to achieve the optimal integrated performance.