The invention relates to the technical field of on-line monitoring equipment for a line of a power supply, particularly to a climbing type portable on-line monitoring device that is resistant to destruction by external forces and is resistant to equipment stealing as well as is capable of checking line armour clamp and an insulator and completing all-weather monitoring on a line. The provided device is characterized in that a main body and a remote controller are arranged. A crawler type climbing mechanism and an on-line monitoring mechanism are arranged on the main body. The n-line monitoring mechanism consists of a controller, a camera, a 4G wireless communication module, a power supply circuit, a control signal receiving circuit, a receiving antenna, a lithium battery group, and a solar cell panel; the controller is connected with the camera, the 4G wireless communication module, the power supply circuit, and the control signal receiving circuit; the power supply circuit is connected with the lithium battery group connected with the solar cell panel by a charging circuit; and the control signal receiving circuit is connected with the receiving antenna. According to the invention, the provided device has advantages of light weight, high capability of single-person operation, and good recoverable performance and the like.