In view of the problem of insufficient flexibly regulating resources the new-type of electricity system faced due to high proportional penetration of renewable energy, a transportation-energy-electricity integrated technology scheme with the new energy vehicle as its core is proposed, coupling energy storage, hydrogen energy and intelligence, with the corresponding technical feasibility, development map and policy suggestion given. The results of predictive calculation show that the interaction between onboard traction battery and electric grid is a distributed short-period energy storage way with high safety, low cost and large scale. In the year of 2040, there will be some 300 million electric vehicles carrying 20 TW·h batteries, in which the flexible adjustable capacity exceeds 10 TW·h, being able to meet the requirements of short-period peak-valley adjustment. The hydrogen energy multi-utilization promoted by hydrogen energy traffic is a long-term concentrated ideal way of energy transformation, the combination of both can meet the daily and seasonal peak adjustment requirements of electricity in 2040 in China, providing forceful supports for achieving double carbon targets.