This topic proposes an optimal scheduling of energy storage system considering the cost of energy storage degradation. Reasonable estimation of the life loss of battery energy storage and optimization of battery energy storage operation are conducive to improving the operating cost of energy storage system in the force market. In this study, a new method for determining the cumulative depth of discharge and the daily cost of the battery is used to build a cost model for battery degradation. This linear approach can be successfully included in the optimization model. In terms of the optimization model, the uncertainty problem is resolved using a scenario-based stochastic optimization method.