Transmission line intelligent video surveillance system is embedded video device, communication channel, the background storage server three components, embedded video device at the scene after the shooting video and images, directly on-site by chroma extraction, wavelet-based Canny edge detection tracking, vector machine classification, image recognition and pattern recognition methods, automatic identification of risk factors generated by overhead transmission line of the body and the surrounding environment, such as wire sag change, invasion of large-scale machinery construction, Bird's Nest, Gone with the Wind hanging like and then generate alarm information back to the server, saving communication costs. After three years of actual operating experience indicate that this system for the transmission line against external damage play a huge role, with broad application scenario.