The article discusses the importance of hydrogen energy as a crucial technological option for decarbonizing energy systems. It emphasizes the comprehensive utilization of hydrogen energy, which includes leveraging its excellent conversion capabilities in combination with electrical and thermal energy. The study points out that current hydrogen utilization modes are relatively singular, leading to low energy utilization efficiency and high wind curtailment rates. To address these issues, the research proposes three utilization modes of hydrogen energy, such as hydrogen storage, integration into a fuel cell and gas turbine hybrid power generation system, and hydrogen methanation. The focus is on developing a hydrogen energy system with multimodal utilization and integrating it into an electrolytic hydrogen–thermal integrated energy system (EHT-IES). By employing a mixed-integer linear programming (MILP) optimization scheduling model for the EHT-IES, the study aims to enhance operational feasibility, minimize economic costs, and reduce wind curtailment rates. Case studies conducted in northwest China validate the effectiveness of the proposed model. Through comparisons of various utilization modes, energy storage methods, and scenarios, the study demonstrates that integrating a hydrogen energy system with multimodal utilization into the EHT-IES provides significant technical benefits by improving energy utilization efficiency and facilitating the absorption of wind energy, thereby enhancing the system's flexibility.