1. An apparatus for updating a voice template for recognizing a speaker on the basis of a voice uttered by the speaker, the apparatus comprising: a storage unit for storing a plurality of voice templates, each voice template indicating distinctive characteristics uttered by a corresponding one of a plurality of speakers; a characteristics extraction unit for extracting distinctive characteristics uttered by a specific speaker on the basis of a voice message uttered by the specific speaker; a selection unit for selecting a voice template from the plurality of voice templates stored in the storage unit on the basis of a degree of similarity between the distinctive characteristics indicated by the selected voice template and the distinctive characteristics extracted by the characteristics extraction unit; and an update unit for updating the selected voice template on the basis of the distinctive characteristics extracted by the characteristics extraction unit.