A problem of disagreement between an actual quantity of prints and a quantity described in order information is solved. The order information transferred from an orderer is stored in a database of an order reception site and in a database of a laboratory. An operator compares the actual quantity with the quantity specified in the order information. If the two quantities do not agree, an instruction to change the order information is input. A correction affirmation system receives this instruction and generates correction affirmation information. The correction affirmation system changes the order information stored in the database in the laboratory and affirms the content thereof. The correction affirmation system then transfers the correction affirmation information to the order reception site. A correction affirmation system in the order reception site changes the order information in the database thereof based on the correction affirmation information, and affirms the content thereof.