Intelligent and low carbonization is the inevitable trend of the development of comprehensive energy digital transformation of group enterprises. Combined with the characteristics of the group enterprise, such as multiple energy varieties, long process, large volume, high requirements for energy conservation and emission reduction indicators, and the needs of actual management, aiming at the problems such as multiple energy subsystems, lack of data interconnection, and lack of intelligent decision-making application based on monitoring data, an integrated energy system architecture based on intelligent decision is proposed, which integrates different kinds of energy subsystems and equipment, and realizes the design and integration of intelligent integrated energy system architecture of group enterprises by combining the practical management and decision requirements of energy-saving transformation, energy efficiency evaluation, energy trading, etc. The design scheme conforms to the law of energy management construction of actual group enterprises, effectively uses the stock of software subsystems and equipment to minimize the system investment, and effectively guarantees the compatibility, openness and scalability requirements of the energy management system, providing a reference for the architecture design of the integrated energy management system of group enterprises.