The invention discloses a transmission-line dangerous source management and control system for looking at potential safety hazards through a handheld device. The transmission-line dangerous source management and control system is characterized by comprising a web camera which is arranged near the corridor dangerous source of a transmission line. The web camera is connected with a video capture and storage server, and the video capture and storage server is connected with a video analysis server. The video analysis server is connected with a message management control center, and the message management control center is connected with the video capture and storage server. A client is connected with a web server and a player, the web server is connected with the message management control center, and the player is connected with the video capture and storage server. The message management control center is connected with the mobile phone of a manager, and the mobile phone of the manager is connected with the video capture and storage server. The transmission-line dangerous source management and control system has the advantages of reasonable structure, automatic identification, active alarm and good working performance.