To provide a centralized exchange processing system, with which efficient input processing is enabled by decreasing overlapped entries in an exchange transaction with a non-routine document.

An OCR client 11 of a business shop 10 transmits the image of the entire non-routine document, on which the contents of the exchange transaction are described, acquired by an OCR device 12 to a file server 32 of a centralized center 30 and this file server 32 temporarily stores the transmitted image in a DB 32a and successively sends them to a correcting client 33. In that correcting client 33, specification information such as recipient information previously stored in the DB 32a is read out, an input picture in the state of inputting that specification information is displayed on a correspondent entry field and input information except for the specification information is inputted to a vacant entry field.