Abstract: With the rapid growth of the number of new energy vehicles, the impact of their energy supplement demands on the planning and operation of power grids cannot be ignored any more. At the same time, with the continuous increase in the installed capacity proportion of wind and photovoltaic power generation, the power grids also urgently need to utilize the energy supplement demand flexibilities of electric vehicles（EVs） to smooth the fluctuations of renewable energy generation output and load power.Promoting the coupling of power and transportation networks can bring social benefits and achieve a win-win situation for all parties. This paper firstly analyzes the key infrastructures and the major stakeholders for the coupling of power and transportation networks. Secondly, the basic mode and objectives of the coupling of the two networks under current and unmanned driving conditions are discussed. Thirdly, the research status of the facility planning, operation, dispatch and control considering the coupling of the two networks is reviewed and summarized. Finally, this paper analyzes and prospects several problems that need to be further studied in the planning and operation optimization for the coupling of the two networks.