A method for optimizing the location of charging stations is proposed for the one-way shared electric vehicle system, with the consideration of rational capacity of charging station and the demand within the served area. Thus the problem of unbalanced vehicle inventory is solved and the customer demand is satisfied to the maximum. The method is based on the mixed integer programming model. The goal is to meet the revenue of the service, the operating cost of the station, and the depreciation cost of the vehicle. The objective function is to maximize the profit of the shared electric vehicle service provider. Finally, simulations are carried out to test the slack and performance of the method, and the model can solve large-scale problems in a reasonable time.