Abstract: In view of the complex energy coupling and fluctuation of renewable energy(RE) sources in the integrated energy system(IES), an improved three-stage energy optimization scheduling strategy is proposed for the hybrid energy storage system(HESS). The power response characteristics of various devices in IES at different time scales are analyzed which shows that the three-stage energy optimization scheduling strategy can be well coupled with the IES including HESS. The advantages of HESS over single energy storage system in stabilizing power fluctuation and extending energy storage life are compared and analyzed while the optimization scheduling strategy of supercapacitor under three-stage energy optimization scheduling strategy is proposed. The primary energy consumption, operating costs, carbon dioxide emissions and load shedding costs are considered as the optimization objectives in the day-ahead rolling optimization stage according to the day-ahead forecast renewable energy data. In the intraday rolling adjusting stage, the proposed method can reduce the effect of the RE day-ahead forecasting errors to achieve the intraday energy scheduling balance and ensure the safe operation of the devices of IES. Considering the background of IES with a high proportion of renewable energy, innovative use of the advantages of HESS is made to improve the power response characteristic of the system. As shown in the case, the application of HESS in the IES can improve the power response characteristic, extend the lithium-ion battery(LiB) life and has more benefits in reducing carbon emissions.