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; an update unit for updating the selected voice template on the basis of the distinctive characteristics extracted by the characteristics extraction unit; a voice recognition unit for performing voice recognition on the voice message uttered by the specific speaker; a keyword extraction unit for extracting a keyword from specific data obtained as a result of the voice recognition by the voice recognition unit; and a determination unit for determining a plurality of candidate templates on the basis of the keyword extracted by the keyword extraction unit, wherein the selected voice template is selected by the selection unit from among from the plurality of candidate templates determined by the determination unit.