A new energy storage system combining high-temperature thermal storage and compressed air storage can help store renewable energy more efficiently. By storing different types of energy separately and using them to generate electricity when needed, this system can reduce wasted renewable energy. The analysis shows that this hybrid system can achieve a round trip efficiency of 64.36% and store 5.38 kWh of energy per cubic meter. The system's performance is improved by this combination, with the high-temperature storage system playing a crucial role. The efficiency of the system is most affected by the output temperature of the high-temperature storage, the efficiency of compressors and turbines, and the operating pressures of the air storage reservoir.