The drone-mounted laser methane detection system (U10) is specially developed for multi-rotor DJI drones. It can be applied to different scenarios with the use of three-axis stabilized gimbal. It can flexibly realize the natural gas leak detection in areas that are not easily accessible by personnel. The application software on the ground side receives the real-time image, detection data, and immediately alarms when a leak is detected. At the same time, it records the inspection track and alarm events, and automatically generates an inspection report. The system supports planned flight and manual flight control, combined with DJI's mature flight control and automatic obstacle avoidance system, to maximize flight safety.