In the context of the development of energy Internet and low-carbon power, integrated energy systems have become an important supporting technology for energy conservation and emission reduction. As the coupling of power and natural gas systems continues to deepen, natural gas supply abundance has an increasing impact on the system. Under this background, this paper proposes an optimal scheduling model for the electric-gas interconnection system that takes into account the adequacy of gas supply, and uses the gas shortage factor to coordinate the unit scheduling, and establishes the system operating cost, environmental pollution, abandoned wind quantity and load shedding. The least cost optimized scheduling model. The analysis of the results of the example proves the necessity of taking into account the gas supply adequacy of the natural gas system in the electric-gas interconnected integrated energy system, and verifies that the proposed model can achieve the goal of reliable, low-carbon and economic operation of the system, and shows that power to gas technology can Eliminate excess energy and achieve the overall economic optimality of the connected system.