The harsh environment and poor communication conditions make it difficult for the operation and maintenance of island microgrid. Firstly, the architecture and function of the island microgrid monitoring system are analyzed. Based on the multi-time scale characteristics of microgrid control, combined with the geographical conditions of remote islands, the hybrid communication method is proposed to meet the communication requirements of the microgrid monitoring system. Secondly, based on the characteristics of communication, the preventive control and emergency control methods of the microgrid are proposed. When the microgrid is operating normally, the load and distributed power output are predicted based on the meteorological environment information monitored, and a microgrid energy scheduling strategy is formulated to implement preventive control measures in the microgrid. When the microgrid is in a state of emergency, the microgrid control center performs emergency load control measures based on the magnitude of the monitored disturbance and load power information. Finally, a microgrid is taken as an example for analysis to verify the validity of the proposed method.