1. A method for controlling a mobile device having a face recognition function using an additional component, the method comprising: determining whether the face recognition function has been activated in a first state of the mobile device; acquiring an image through a camera, if the face recognition function has been activated; extracting at least one of a facial figure and at least one main component included in the facial figure by analyzing the acquired image; determining whether a face recognized from the image matches a registered user's face based on the at least one of the facial figure and the at least one main component; determining whether an additional figure recognition function has been activated; extracting at least one of an additional figure and at least one additional component included in the additional figure, if the additional figure recognition function has been activated; and switching the mobile device to a predetermined second state corresponding to the at least one of the additional figure and the at least one additional component.