The invention belongs to the field of distribution network dispatching and managing, which provides a wind-light storage combined dispatching method and system used for distributed microgrid island operation. According to collected real-time data as well as photovoltaics and fan power generation and power load prediction data obtained by calculation, the total output power of photovoltaics and fan and a load and energy storage inverter system are coordinated and controlled to satisfy the requirement of system power balancing; the energy storage and the load of the photovoltaics, a fan and a storage cell are considered in a coordinating mode; a control signal is emitted to cause each inverter to output active power required by a microgrid system to achieve the optimal energy use ratio; therefore, the microgrid system can integrate the power generation and power consumption situations between three systems of a fan system, a photovoltaic system and an energy storage system and load so as to coordinate each subsystem to effectively operate; when an external grid is detected to restore to be normal, the microgrid system is switched to a grid-connected operation mode according to a grid-connected and island mode switching control strategy, and the economy and the stability of the microgrid system in the island mode can be improved.