Aiming at the problems that the integrated energy system （IES） is difficult to optimize and scheduling due to the wide variety of equipment, and the utilization efficiency of comprehensive energy is low, an integrated energy system optimization scheduling Model based on generalized energy storage （GES） is proposed. Firstly, GES models of various loads are established, which simplify the information interaction between energy scheduling and consumption. Then, based on the GES model, day-ahead and intra-day optimal scheduling models are established to provide an effective way for IES energy flow analysis and optimization. Finally, IES simulation testing system is built which verifies the effectiveness of the proposed model. The simulation test results show that the optimization model can fully tap into the scheduling potential of the load, relieve the pressure of energy scheduling supply and demand balance, reduce the cost of power system, reduce the time for collaborative analysis and calculation, and improve the calculation efficiency and accuracy.