To prevent an error from being generated by mutually checking pieces of information regarding working by mutually checking written application data and instructing an approval terminal to correct a contradiction in such a case where approval is given according to approval data inputted from an approval terminal.

An approval process part 20 displays received application data in order on the approval terminal. When application data to be approved is an application for a business trip or yearly allowable paid holiday, a check process is carried out. Namely, an approval check table is referred to and the same item as a business trip kind or yearly allowable paid holiday kind which tried to be written to an article field of a service record table is searched for in approval item fields. When the check item corresponding to the item is already written to the item field, a working information approval part 21 informs the approval process part 20 that improbable conditions are being approved and the approval process part 20 instructs a correction instruction process part 26 to output a correction instruction.