Abstract: Under the guidance of the dual carbon goals, energy structure transformation is currently a key focus in the global energy sector. Therefore, integrated energy systems that enable multi-energy coupling are becoming a core direction of energy transformation. Against this backdrop, this paper takes hydrogen-methanol interconversion multi-energy coupling technology as the core and electric-thermal integrated energy system as the carrier to investigate the low-carbon economic performance of hydrogen-methanol energy storage systems and enhance their renewable energy accommodation capacity. First, this paper conducts research on low-carbon economic operation strategies for methanol-involved integrated energy systems. Based on the collaborative optimization mechanism of hydrogen-methanol interconversion, it constructs a multi-objective optimal operation system that balances low-carbon objectives and economic benefits. Meanwhile, this paper conducts research on the scheduling problem of integrated demand response strategies. Based on the core characteristics of multi-energy coupling and collaborative operation of integrated energy systems, it deeply analyzes the internal operation mechanism of integrated demand response. The experimental results show that the proposed hydrogen-methanol energy storage integrated energy system combined with integrated demand response strategies can effectively smooth load fluctuations, achieve peak shaving and valley filling, improve the operational flexibility of the system, and promote the low-carbon transformation of the energy structure.