Abstract: In view of the characteristics of China's fossil energy resource endowment of "rich coal, poor oil and little gas", as well as the problems of extensive coal development, release and utilization, low coal utilization efficiency and outstanding overcapacity, this paper introduces an application example of a regional integrated energy demonstration project in north China based on clean coal power as the main energy source. Firstly, the system infrastructure and main energy flow of regional integrated energy demonstration project are described, and the mathematical model of integrated energy system is expounded from the perspective of operation cost. Then the energy balance characteristics of the integrated energy system and the main operating indexes and constraints of the system are introduced. Finally, based on the engineering application example of the integrated energy demonstration project, the energy efficiency and the integrated energy supply cost of the integrated energy system are analyzed, and the main advantages and characteristics of the regional integrated energy demonstration project are analyzed. The results show that the clean coal power generation is an indispensable transition path for China's energy transformation and may be one of the main development directions of China's energy transformation and clean coal power generation in the future.