Abstract: The agglomeration of energy-intensive enterprises makes the cost of energy consumption in the park extremely high and increases the uncertainty of the stability of the grid operation. Therefore, a comprehensive energy system with the overall arrangement of new energy conversion equipment has emerged. The article proposes a block diagram of the operation mode of the integrated energy system, and establishes an output model according to the operating characteristics of each equipment, constructs an optimization function with the goal of the lowest daily operating cost of the park, and takes the rated operating state of each equipment as a constraint. The optimization results based on the improved grasshopper optimization algorithm show that the industrial park equipped with integrated energy system has a significant reduction in energy cost, and increases the ability to absorb the scenery, which has better economic and environmental benefits. Finally, the operation cost of each part before and after optimization is compared to verify the effectiveness and reliability of the proposed method.