Abstract: Standardization is a necessary way to realize information interaction among multiple management entities of the integrated energy system（IES）.Compared with traditional power systems,the standardization of IES has technical challenges such as multi-energy flow coupling,more complex operation scenarios,and various types of equipment with different characteristics.Based on the experience of power system standardization,a two-layer IES model architecture with single-energy-flow layer and multi-energy coupling layer is designed to adapt to different operaton senarios.A standardized modeling method for heterogeneous energy flow of quasi-power system is proposed and the structured modeling of source-grid-load of single-energy-flow is realized.A standardized modeling method for multi-energy coupling equipment based on aggregation-derivation is proposed,which takes into account the common and individual characteristics of various energy coupling equipment.The developed standardized model generation module has been integrated into a park integrated energy management system and used online in a northern park in China,realizing standardized expression and information interaction of the coolly-heat-electricity-gas multi-energy system model.