Abstract: The port integrated energy system is the symbol of the integrated development of energy and transportation systems, as well as an important route for energy saving and emission reduction in port areas. However, the integrated model for port integrated energy system is still suspended. This paper analyzes the flexible resources and formulates the corresponding energy usage models for those flexible resources. Then the energy flow models for the port integrated energy systems are reviewed based on the current research on land-based applications. At last, by comprehensively reviewing current research, this paper proposes three future key technologies: planning methods under energy-transportation integration, operation methods under energy-transportation integration, and energy efficiency evaluation index framework. The reviews show that, the modelling of port integrated energy system is just initialized, but the integrated model is still suspended and the tentative models proposed in this paper can be a basic tool for the future research in port integrated energy systems.