In order to satisfy the requirements of microgrid energy scheduling, this paper proposes an energy optimal dispatching method based on energy storage battery SOC for microgrid in both online and offline modes. In terms of scheduling response, it could meet the needs of dispatching plan response to exchange between microgrid and grid approaches to the scheduled curve as close as possible. In the aspect of economic operation, it could meet the need of distribution transformer optimum running at PCC, and sell electricity revenue maximization to participate in demand side management for power supply. Meanwhile, using this strategy can make full use of renewable energy under the condition of the premise of guarantee microgrid stable operation for microgird in offline mode, also ensure that the important load power supply and prevent the battery overcharge and discharge at the same time. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2015AA050104) and National Research and Demonstration Project of Energy Application Technology (No. NY20150302).