Integrated development of vehicle and power grid is an important way for deep integration of new energy vehicles and traffic energy. Under the guidance of the national energy strategy，it has become an important practice to use the mobile energy storage characteristics of new energy vehicles，optimize the transportation energy structure via vehicle & power grid interaction and help the construction of new power systems. This paper systematically introduces the vehicle & power grid interaction system and confirms the important role of new energy vehicles in building a clean energy system and assisting the realization of the “double carbon” goals through specific cases of vehicle & power grid interaction. In addition，this paper starts from practice experience and puts forward three suggestions of increasing the support for vehicle-network interaction，accelerating the construction of interconnected intelligent charging networks and expanding the scale of vehicle & power grid interaction for the purpose of accelerating the development of vehicle & power grid interaction and helping new energy vehicles and traffic energy to reduce carbon emissions.