The utility model discloses a monitoring devices of electric substation, including setting up a plurality of monitoring area in the electric substation, every monitoring area sets up a plurality of power supply units interior the correspondence, and every monitoring area is provided with the monitoring frame rather than the adaptation, the monitoring frame is including setting up at the subaerial underframe of electric substation, and the each side of underframe is provided with a set of vertical monitoring slide, and the top that is located the slide is provided with the top frame rather than the adaptation, be located all to be provided with on the monitoring slide about the underframe and prolong gliding laser emitter about its, be located and be provided with laser receiver, laser emitter and laser receiver one -to -one on the monitoring slide on underframe right side. The utility model discloses in the time of can effectively solving the current personnel of electric substation operation, there have the operation easily to be lack of standardization, and cause the management inconvenient, has the problem of hidden danger safely.