Abstract: In order to address the problem of the high cost of hydrogen production caused by electricity prices, a novel integrated energy system combining geothermal and hydrogen energy is proposed by integrating renewable energy with hydrogen production process, which consists of a geothermal power plant, a hydrogen production facility, a hydrogen storage unit, and a fuel cell. Meanwhile, an optimization model with two layers is designed for the system, the upper layer of which seeks to reduce construction costs while increasing the capacity for producing hydrogen, and the bottom layer seeks to reduce daily operations while improving the equipment utilization of the integrated energy system in various scenarios.The improved non-inferior genetic algorithm and mixed integer linear programming are employed to solve the model. The simulation results show that compared with the single geothermal power generation system and the hydrogen production system, the proposed geothermal-hydrogen integrated energy system electricity purchase illustrates less load loss and more economic and environmental benefits.