Abstract: The conflict of interest among entities in the integrated energy system (IES) is a challenge about operation decisions. An optimal scheduling model of electric-heat-hydrogen integrated energy system based on Stackelberg game is proposed. Firstly, an energy producer (EP) model is formulated which considers the full utilization of hydrogen energy. Secondly, the interaction of price information among EP, energy system operator (ESO) and load aggregator (LA) is analyzed. Considering the resource integration utility of load aggregators under demand response mechanisms, the payoff model of each entity in IES is established. Finally, a Stackelberg game model with ESO as the dominator, EP and LA as the followers is introduced. Genetic and quadratic programming algorithms (GA-QP) are used to solve the model. Taking a park-level IES in Northern China as an example, the effectiveness of this model in promoting the balance of interests among various entities is verified.