The invention discloses an antitheft box-type transformer substation system. The antitheft box-type transformer substation system comprises a box-type transformer substation, a ring main unit, a plurality of image snapshot devices, a well lid movement monitoring device and a processing unit, wherein the ring main unit is connected with the box-type transformer substation through an electric wire; the electric wire is buried in an electric well lid; the image snapshot devices are respectively arranged in the box-type transformer substation and/or the ring main unit; when the box-type transformer substation and/or the ring main unit is opened, image information of an opening person is acquired; the well lid movement monitoring device is arranged on the lower portion of the electric well lid and is used for monitoring movement states of the electric well lid; and the processing unit is connected with the image snapshot devices and the well lid movement monitoring device and is used for generating alarming signals according to the image information and/or the movement states. The antitheft box-type transformer substation system can send out alarming signals when the well lid moves and a door is opened, images containing posture and facial features of thieves can be shot and serve as evidences, theft can be deterred, risks that cables in the transformer substation system are stolen are reduced, and the social cost is saved.