LoRa has the advantages of low cost, low power consumption, and flexible configuration. It can effectively solve the communication requirements in various applications in the integrated energy system of industrial parks. For the first time, the paper proposes the information collection, transmission and control system of the integrated energy system in the park based on the Internet of Things. Then this paper integrates it with the three-level structure of the integrated energy system to construct a three-level star communication system based on the Internet of Things. Then this paper uses the OPNET Modeler technology to build the communication mode of the Internet of Things monitoring system of the park integrated power system based on this technology. According to the actual working characteristics of the system, a multi-scenario simulation based on the system is carried out. Simulation experiments prove the correctness of the model. This system also has certain reference significance for the engineering practice and promotion of LoRa technology in the integrated energy system of the park.