A plurality of kinds of information relating to articles are stored in a manufacture-coherent information data base (20) by being related, so as to specify for each article a group of information relating to each article. A first code generating section (43) generates for each article a first code that indicates contents inherent to the article by using a part of the group of information specified for each article. A second code generating section (44) generates for each article a second code that includes information, which is of contents inherent to each article in the group of information and not included in the first code. A two-dimensional code generating section (45) generates an optical information code (two-dimensional code) that indicates the first code, and an identification code generating section (46) performs prescribed conversion processing to the second code to create character string data (identification code). A print control section (47) executes marking processing to mark the generated optical information code and the character string data on the article or to the object attached to the article.
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