Method for calibrating ambient light sensor and system thereof

A method for calibrating an ambient light sensor and a system thereof are provided. One standard light source is utilized to irradiate a plurality of electronic device samples one by one, the ambient light sensor can sense the standard light source and output a light sensation value to an arithmetic unit, statistic analysis is carried out on the light sensation values to obtain an average value, an electronic device to be calibrated is irradiated by the standard light source, the ambient light sensor can sense the standard light source and output a light sensation value to a calibrating device, a calibrating value can be obtained according to the average value and the light sensation value, the calibrating value is loaded into the electronic device to be calibrated through a calibrating module, and the electronic device to be calibrated can become the calibrated electronic device. The calibrating module is operated by the calibrated electronic device. Furthermore, the ambient light sensor can sense light to o