The acceleration of electrification，connecting and intelligence of new energy vehicles has brought new ideas for the integrated development of smart cities，intelligent transportation and intelligent vehicles. At the same time，the integrated development of smart cities，smart transportation and intelligent vehicles has also become an inevitable trend in the next stage of the transformation and development of new energy vehicles. Now，Beijing，Wuhan and other cities are strengthening the exploration and practice of the integrated development of smart cities，intelligent transportation and intelligent vehicles，carrying out the planning and construction of urban intelligent infrastructure，building a vehicle-city-network platform aggregating dynamic and static data，aiming at the implementation of diversified demonstration applications in automobiles，transportation and cities，promoting the development of key technologies and industries in related fields and striving to create an integrated development system that integrates technology，industry，data，application and standard. However，the integrated development of smart cities，intelligent transportation and intelligent vehicles still encounters some problems such as imperfect coordination mechanism，immature cross-domain integration and development as well as lack of some standard documents. In addition，it is also necessary for the government and enterprises to continue to make efforts to establish a cross-departmental coordination mechanism as soon as possible，promote cross-field and cross-industry cooperation，support the pilot test of innovative application models，research and formulate a unified standard system.