[en] The developed live-line robot is installed in the commercial live-line working truck used in the live-line works. The optimal installing position and method was analyzed by the graphical simulation. The dual arm robot was designed to have a maximize work space through the optimal configuration simulation in which the accessibility and interference of the robot to the distributed line environments were checked. The shape, material and size of the links was designed through the mechanical analysis, The prototype was made based on the analysis. The developed robot is insulated by the upper arm made of the FRP material. The insulation performance of the robot was verify by the leakage current test and the flashover voltage test. A tele-operating control system was developed for a operator to easily manipulate the developed robot and to actively manage the various conditions of the distributed line. The functions of the robot tested in the mockup. The insulation performance was tested and verified in the KERI (Korea Electrotechnology Research Institute). Finally, the performance of the developed robot was tested at the distributed line of the Gochang electric power test center