Integrated energy system is an important means of “multiple energy complementary and coordinated development of source, network, load and storage” in industrial parks. Firstly, load characteristics of industrial parks represented by large industrial parks, high-tech parks and other professional parks are analysed. Based on the load characteristics, the construction direction of integrated energy system for each type of industrial park is proposed. Secondly, technical, political and economic constraints at different stages of the development of the integrated energy system in these parks are studied. And based on this study, the short-term, mid-term and long-term development directions of integrated energy technologies in industrial parks are proposed considering planning and construction, operation optimization, coordinated control, demand management and market transactions. Finally, a technical framework and specific connotation for the construction and operation of integrated energy system are proposed.