The rapid development of electricity demand and the electric vehicle industry will accelerate the construction of urban substations and charging/swapping stations, but it is also limited by existing land resources and other issues. Therefore, based on the prefabricated substation with the advantage of intensive resource utilization, this paper proposes an optimal operation strategy under the multi-station integrated service mode, considering the integration of the prefabricated substation and the electric vehicle charging/swapping station. Firstly, the comprehensive service framework of prefabricated substation-charging/swapping station is established, and the feasibility of its integrated operation is analyzed. Within this framework, the virtual energy storage capacity of electric private vehicles and the swapping demand of electric taxis are analyzed, and a battery timing simulation model considering discharge behavior (vehicle-to-grid, V2G) of the swapping station is proposed. Finally, the charging and discharging behaviors of batteries were reasonably regulated according to the characteristics of EV travel, charging and discharging, and battery energy storage in the charging/swapping stations. The result shows that the proposed method can play a role of smoothing load fluctuation and cutting peak load and filling valley by reasonably evaluating the requirements of virtual energy storage and swapping demand.