The invention relates to the technical field of light illumination, in particular to a light control method. The method comprises the steps of obtaining a crowd image which is located outside an unmanned store and in a default region when detecting that no consumer is in the unmanned store; determining an in-store consumption confidence value of users in the crowd image; and controlling on/off oflight in the unmanned store according to the in-store consumption confidence value. According to the light control method, intelligent adjustment of the light in the unmanned store can be achieved, the energy consumption is reduced and the energy waste is avoided at the same time.