The invention discloses a Beidou-based electric power patrol inspection device. The Beidou-based electric power patrol inspection device comprises an automobile and a vehicle-mounted pilotless helicopter; the vehicle-mounted pilotless helicopter is provided with a Beidou inertial integrated attitude position detection device; a three-coordinate rotation detection nacelle is arranged on the outside or the external lower part of the vehicle-mounted pilotless helicopter; the three-coordinate rotation detection nacelle is provided with a gyroscope-stabilized platform; the gyroscope-stabilized platform is loaded with a visible light camera, an ultraviolet imager, and a full-digital dynamic thermal infrared imager; the vehicle-mounted pilotless helicopter is also provided with a radio frequency target recognizer used for recognizing radio frequency information of pole towers under patrol inspection; the flight route of the vehicle-mounted pilotless helicopter is planed based on Beidou navigation system, and the driving route of the automobile is planed based on a patrol inspection route. Electric power patrol inspection can be performed both on the ground and in the air at the same time, and completed segment by segment; labor cost is reduced; and the Beidou-based electric power patrol inspection device is convenient and rapid to use.