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; generating a preliminary label candidate group including the 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; generating a final label candidate group including the at least one label having the image characteristic, which is similar to the detected image characteristic; and providing each of the at least one label included in the final label candidate group and detailed information corresponding to each of the at least one label included in the final label candidate group.