To perform seizure of a part purchase result at each base as a system.

A price information file 11 and an acceptance result file 12 are received from the respective bases. A master 13 stores the file 11 and purchase goods information of the whole group with article name codes as main keys, and a table 14 connects control keys of the respective bases with the article name codes. A means 1 checks up the file 11 with the master 13, and when the article name codes do not coincide with each other, a means 12 attaches a temporary article name code, and a means 13 inquires of a buyer. The means 14 checks up the file 11 with the table 14, and renews and prepares the table 14. A means 5 prepares a whole company file 15 from the whole file 11. A means 6 renews the master 13, the table 14 and the file 15 when receiving a reply from the buyer. A means 7 checks up a file 12 with the table 14, and corrects the file 12. A means 8 prepeares a whole company file 16 from the whole file 12. A means 9 prepares a result retrieving table 17 by merging the file 15 and the file 16.