To improve the efficiency, cleanliness and economy of integrated energy service providers, an optimal operation strategy of integrated energy service providers based on a demand side game is proposed. Through the analysis of an integrated energy service provider model, the system carbon emission is determined by the user's energy consumption, and the carbon emission model is established to determine the park carbon emission. Considering the user's ability to bear the fluctuation of energy consumption cost and the service provider's risk cost to cope with the change of energy consumption, a comprehensive energy service provider-multi-user game optimization model is established. This is achieved by taking the maximum profit of the integrated energy service provider and the minimum energy cost of users as the objective function. Through an iterative search method, the Nash equilibrium solution is obtained, and then the optimal operation strategy of the service provider is obtained. Finally, a typical industrial park is taken as an example to verify the proposed strategy. The results show that the proposed strategy can effectively reduce the carbon emissions of the system, and improve the economic benefits and user satisfaction of the integrated energy service providers. This work is supported by the Natural Science Foundation of Jiangsu Province (No. BK20190710).