Infrared light supplementing method, device and system and computer readable storage medium

The invention relates to an infrared light supplement method, and the method comprises the steps: obtaining a to-be-recognized face image of a target object under the initial infrared lamp brightness, and determining a face region in the to-be-recognized face image, the face region comprising face features; determining a face local area in the face area, and obtaining the average brightness of the face local area according to the brightness of pixel points in the face local area; and according to the average brightness and an exposure brightness threshold, determining that the to-be-recognized face image has an overexposure condition, and reducing the brightness of an infrared light supplement lamp. Through the method and the device, the problems that the intelligent equipment cannot accurately recognize the obtained face image in different ambient light and the face recognition efficiency is low are solved, the average brightness of the local face image is calculated to judge that the face image is in an ove