Abstract: With the growth of global energy demand and the rise of environmental awareness, traditional energy systems are becoming obsolete and no longer meet modern needs. Integrated energy systems(IES) have emerged as a research hotspot due to their ability to integrate various forms of energy, effectively tackling these challenges. However, the operation of IES involves multiple stakeholders, and the distribution of interests and modes of cooperation among them are the main issues hindering the system′s progress. To address this, our study proposes an optimization strategy for IES based on cooperative game theory. The research first established a comprehensive framework for IES and performed modeling and simulation of multi-energy equipment. Through the RCG alliance, significant economic and environmental benefits have been achieved. After simulation analysis, the cost of abandoned wind power was reduced by 6317, carbon emissions were lowered by 838.03 t, and carbon trading revenue increased by 26097. The Shapley value method ensures a fair distribution of profits. Overall, the total revenue of the RCG alliance exceeded the sum of independent operations, with each member′s revenue or cost savings being better than acting alone. This demonstrates the clear advantages of the cooperative model in enhancing the absorption capacity of wind and solar energy, optimizing the efficiency of the power system, reducing environmental impact, and improving the energy structure.