Abstract: The district-level integrated energy system (DIES), which is characterized by the interconnection and interaction, plays a significant role in constructing a clean, low-carbon, safe, and efficient modern energy system. This paper firstly analyzed the influences of the interconnection in the form of multi-energy coupling, multi-system integration, multi-district uniting and the influences of the multi-link, multi-agent, and multi-time scale interaction on DIES. Then, based on the models of the energy station and energy networks in DIES, the essential characteristics of energy conversion and energy flow were abstracted. On this basis, the general model of DIES planning considering the interconnection and interaction was established, in which the objective functions and constraints in different scenarios, modeling methods of uncertainties, and solving methods were compared. Finally, the possible development directions of the DIES planning considering the interconnection and interaction were proposed.