The utility model relates to a real -time monitor system of transformer substation specifically is a job site of transformer substation safety tree type monitored control system based on wire transmission. The utility model provides a current real -time monitor system of transformer substation lack reasonable network topology structure, lack unified efficient transmission medium's problem. Job site of transformer substation safety tree type monitored control system based on wire transmission is including terminal subtotal transmission medium part, the terminal part is including the M front -end collection of group equipment, video server, wired megaphone, the transmission medium part is including paired line, radio wave channel, the every front -end collection of group equipment all includes a wireless main base station, wireless basic station, 2N wired bridge, a 2N pan -tilt camera, the 2N battery of following, 2N wired bridge constitutes tree topology structure's branch, wireless main base station and the wireless trunk that constitutes tree topology structure from the basic station jointly. The utility model is suitable for a job site's of transformer substation security monitoring.