Abstract: The information processing device includes: a reception unit configured to receive image data regarding an accounting supporting document; a first acquisition unit configured to recognize characters in the image data and acquire the recognized characters as character data; a first identification unit configured to identify a purpose classification on the basis of the character data acquired by the first acquisition unit and the image data; an allocation unit configured to identify a standard item regarding the accounting supporting document on the basis of the character data and allocate characters to the standard item; an association unit configured to associate the characters with other characters adjacent to the characters; and an output unit configured to output the purpose classification identified by the first identification unit and the standard item and the other characters in a format in which the standard item and the other characters are associated by the association unit.