The large amount of air-conditioning load puts great pressure on the recovery of isolated microgrid. On the premise of not affecting the recovery ability of island load, an optimal operation control strategy of island air-conditioning load that can maximize user comfort is proposed. Considering the predicted data of fluctuating power output, load access and temperature change, the start and stop time and operating power of air-conditioning load are optimized from the whole time of microgrid island operation. The simulation results based on the improved IEEE13-node system show that the proposed optimal control strategy meets the user's comfort requirements while ensuring the power supply for the important loads of the island, and improves the flexibility of the island air-conditioning load control.