Abstract: The high proportion of new energy access leads to the power unbalance in electric system, which necessitates an increasing demand for flexible adjustment resources in electric system. Energy storage plays a vital role in enhancing the flexibility of the electric system and promoting the consumption of new energy. To address the issues of low utilization rate and long payback period of energy storage on the power generation side, an optimal configuration model of shared energy storage in new energy base is proposed based on a diversed business model. Considering the correlation between wind and photovoltaic, a leasing coordinated strategy is carried out to mitigate the bid deviation of new energy stations between day ahead and real-time energy markets. Through optimizing combination, the remaining capacity of energy storage is utilized for market energy regulation and makes a profit. An operating mechanism for shared energy storage is established within the electric market environment, and it is embedded into the planning model with the aim for minimizing costs, including those associated with new energy stations and sharing energy storage systems. The results of the instances demonstrate that the optimal configuration model can effectively improve the economy of the energy storage system and promote the consumption of new energy. Moreover, the allocation results have an impact on the electricity price mechanism and wind-solar resource endowment.