1. A method for controlling a mobile device having a face recognition function using an additional component, the method comprising: acquiring an image through a camera of the mobile device, in a first state of the mobile device; extracting 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 using the face recognition function matches a registered user's face based on the extracted facial figure and the at least one main component; extracting at least one of an additional figure in the acquired image and at least one additional component included in the additional figure, if the face recognized from the image matches the registered user's face; and switching the first state of the mobile device to a predetermined second state of a plurality of second states in response to the extraction of the at least one of the additional figure and the at least one additional component, wherein each state of the plurality of second states constitutes one of a plurality of unique software applications executing a plurality of functions of the mobile device, each function of the plurality of functions different from each other function of the plurality of functions and different from a function of the first state, and wherein the predetermined second state corresponds to the extracted at least one additional figure and the at least one additional component.