In order to meet the requirements of“carbon peak”and“carbon neutralization”, relying on the rich resources of substations, the multi-station integration has become an important way for power grid companies to expand comprehensive energy services.Therefore, it is necessary to summarize the architecture designing,modeling theory and strategy optimization method of multi-station integration. On the basis of summarizing the development of multi-station integration, the existing main architecture is classified by AC and DC power supply, and both the overall architecture and the local architecture are summarized. Then, the mathematical models of energy storage power station, data center and charging station in multistation integration are analyzed and summarized. Next, the objective functions and constraints in capacity optimization and strategy optimization are classified and summarized. In addition, the existing problems are also analyzed, and the development and prospect of the key technology of multi-station integration are discussed.