Abstract: Aiming at the problems of the traditional integrated energy system neglecting the equipment variable load rate characteristic modeling, which leads to the reduction of the economy of the dispatching plan, a "source-load-storage" collaborative optimization dispatching strategy of the integrated energy system considering the equipment variable load rate characteristic is proposed. The artical based on the research on the operating characteristics of the equipment on both sides of the system "source-storage", a variable load rate model of the equipment is established to reduce the scheduling error caused by the traditional constant efficiency model; The master-slave game theory is introduced to analyze the integrated energy in the interaction process between the supply and demand sides of the system, a master-slave game model on both sides of the supply and demand that takes into account the characteristics of the variable load rate of the equipment is established, and it is proved that the proposed game model has a unique equilibrium solution; finally, a simulation analysis is carried out for the integrated energy system of a park. The simulation result shows that the strategy proposed in this paper can realize the coordinated operation of the "source-load-storage" of the integrated energy system, and improve the economic benefits of the supply side and the demand side.