A low-power face identification method includes emitting at least one first light signal to an object, receiving at least one second light signal reflected by the object and then encoding the at least one second light signal to generate a coded second light signal according to a transmission format, decoding the coded second light signal to generate a decoded light signal, extracting two-dimensional image information from the decoded light signal, performing a two-dimensional face detection function by an artificial intelligence chip according to the two-dimensional image information, inhibiting a two-dimensional face recognition function when a two-dimensional face image is undetected, and disabling an image converter by the artificial intelligence chip in order to inhibit a three-dimensional face recognition function when the two-dimensional face recognition function is inhibited.
Low-power face identification method and low-power face identification system