To prevent failure and omission of correction information taking-in in the release of a revision of a source program.

Each source program 10 has a version management table where the revision number of the source program, the version, the discharge day, the release day, the correction information table number, and the correction information number to be taken into the revision 30 are stored as information related to the revision; and after revision of the source program, a correction information table 20 corresponding to the correction information number to be taken into the revision is taken out from the version management table. If there are plural correction information tables to be taken in, they are merged to be one correction information table 20 and to generate a difference list having the information of difference between the correction information table 20 and the source program 10, and correction information to be taken in, which is obtained from this difference list, is taken into the source program 10 after revision, and the source program 10 after revision which this correction information is taken in and the actual source program 10 before revision are compared with each other to generate a correction information table 20 for this revision 30, and the revision history of the source program 10 is held.