1. A method for retrieving a label using a label retrieval apparatus, the method comprising the steps of: obtaining a label image photographed through a camera; extracting characters included in the label image and recognizing the extracted characters; detecting at least one label including the recognized character from a label database including multiple labels and information on the multiple labels and constituting a preliminary label candidate group including said at least one label; detecting an image characteristic of the label image; detecting at least one label having an image characteristic, which is similar to the detected image characteristic, from the preliminary label candidate group, and constituting a final label candidate group; and providing each of said at least one label included in the final label candidate group and detailed information corresponding to each of said at least one label.