In order to realize the low carbon development under the double carbon background and solve the multi-energy supply and energy saving and emission reduction problems of integrated energy system, a low carbon optimized operation strategy of integrated energy system containing a kind of solar thermal power plant and hydrogen energy storage is proposed. By analyzing the joint operation of TES system and hydrogen energy storage system, a multi-storage joint supply model is established to effectively realize the mutual transfer of electricity-thermal energy, improve energy utilization and optimize the operational flexibility of the system. Carbon trading and carbon tax are introduced into the system decision, and a low-carbon dispatch optimization model of the integrated energy system is constructed with the objective of minimizing the comprehensive costs of energy purchase, operation and maintenance, and carbon trading costs. Finally, different scenarios of operation are analyzed and the optimization model is simulated and analyzed.