A control for a power saving of an electronic device is disclosed. The device includes a camera configured to be activated and then obtain an image when no input event is received within a given time after activation of a selected function. The device further includes a control unit configured to, if the obtained image contains a specific pattern, determine whether the specific pattern corresponds to a human face pattern, and to, if the specific pattern does not correspond to the human face pattern, perform a power saving control of the electronic device.