Abstract: In view of the large number of sites, wide coverage and high safety risks of power grid construction projects, a multirotor UAV patrol system is proposed as a new construction safety and quality monitoring technology. Since the multirotor UAV patrol system is miniaturized, lightweight, intelligent and the viewing angle is optional, it can detect safety risks and quality problems more quickly. UAV cameras are like the eyes of regulators and play an important role in safety supervision and quality management. It can solve the problems of low pixels, long shooting distance, single shooting angle, backlight, etc. of the camera, and can also find quality hidden dangers that are difficult to find in usual inspection and acceptance by naked eyes. It can effectively avoid inspection blind spots and ensure the quality of the project.