The transmission line video monitoring device uses advanced digital video compression technology, low power consumption technology, GPRS/CDMA/3G wireless communication technology, new energy and other technologies, which can be used for the transmission line body and the line corridor environment (the transmission line body includes the transmission wire , Poles, towers, insulator strings and spacers, wire clamp fittings, etc., the line corridor environment includes foundations, vegetation, surrounding personnel, vehicle activities, etc.) to monitor the scene to take photos or videos; the device adopts GPRS/CDMA/3G/optical fiber/WiFi, etc. The data is transmitted to the condition monitoring agent device (CMA) or the master station system, and under the control of remote instructions, the camera's focal length, aperture, position and pan/tilt preset position can be set and adjusted.