The utility model provides an audio and video returning system for emergency rescue in a wind farm, comprising a fixed monitoring system, a vehicle-borne monitoring system, an individual monitoring system and a monitoring center. The audio and video returning system is characterized in that the fixed monitoring system includes a camera, a video encoder and an optical switch, signals of the camera are accessed into the video encoder, the video encoder converts received video signals into digital signals and outputs the digital signals to the optical switch through a network cable, and the optical switch transmits the digital signals to the monitoring center through an optical fiber; the vehicle-borne monitoring system includes a vehicle-borne camera, a vehicle-borne video transmitter and a wireless video receiver; and the individual monitoring system includes individual backpack equipment and a wireless AP, and the individual backpack equipment includes a camera IV and a wireless video encoder. According to the utility model, the wind farm can be monitored in real time, the video monitoring is digital, networked and intelligent, and the system has the characteristics of being high in integration, strong in mobility and flexible and convenient in monitoring and can be widely used in electric power and other fields.