The invention aims to provide a face recognition early warning device for safe and private occasions. At the beginning, a back face of a display screen faces the front, firstly, a password controlleris started by inputting a password, then the display screen rotates to the front, a CNN controller is also started, then an acquisition camera acquires a face, the CNN controller is used for comparison, a door lock is opened when the comparison result is right, an alarm is given by an alarm when the comparison result is not correct, and a smoke sensor is arranged for sensing fire disaster smoke soas to give an alarm; therefore, face recognition and early warning can be safely and reliably carried out, and the safety is high.