The invention discloses an unmanned substation work group entry authentication intelligent device, including a CPU for the master control function. The intelligent device also comprises an electronic switch, a timer, a display, a keyboard input module, a wireless gateway, a drive circuit and a camera which are connected to the CPU. The unmanned substation work group entry authentication intelligent device performs anti-theft control of the door lock of the substation by using a mode that the mobile phone receives a dynamic password. The dynamic password is changed every time the person enters the substation. The password sending service of the control center is bound with the assigned mobile phone of the worker, so that defects of the traditional key, entrance guard card or fixed password unlocking mode are avoided. Meanwhile, the whole anti-theft device is provided with the human body sensing function, is started when the person approaches and cannot be started at other times, so that the object of reducing energy consumption is achieved.