The utility model discloses a three -dimensional safety device in transformer substation job site, including setting up three cameras on transformer substation's job site electric line iron tower, just the camera site of three cameras is different, forms on -the -spot full angle shot, three cameras pass through wifi and wireless router is connected with video analysis server, give video analysis server with the image transmission who gathers, and video analysis server passes through APN intranet special line and is connected with video monitoring platform, and video monitoring platform is connected with customer end computer and mobile client, it organizes to set up the upper and lower light filling that sets up respectively that is located camera top, below position on the iron tower, the three infrared light filling appearance that is 45 contained angles each other of every light filling group facial make -up. The utility model discloses rational in infrastructure, the working property is good, can in time monitor the transformer substation job site.