Automatic exposure compensation method and system for TOF camera module

The automatic exposure compensation method of the TOF camera module comprises the following steps: acquiring first depth data and first gray scale data of a target object at a first preset exposure time through the TOF camera module; collecting specific data of the first gray scale data to generate first measurement brightness data; generating a first automatic exposure gain based on the first measurement brightness data and first reference brightness data; generating a first suggested exposure time based on the first automatic exposure gain and the first preset exposure time; collecting second depth data and second gray scale data of the target object through the TOF camera module according to the first suggested exposure time; acquiring a first depth compensation value corresponding to the first suggested exposure time based on the first suggested exposure time; and compensating the second depth data based on the first depth compensation value to generate second compensation depth data corresponding to the