This study is a part of the serial studies on the historical developments of cataloging rules in Korea and focuses on the rules related with KORMARC. As for KORMARC fomats, the experimental format based on LCMARC and UKMARC was developed in 1980, after that, KORMARC Pyojunyong Format for monographs in 1981, KORMARC Pyojun Format for monographs in 1984. At last KORMARC KS Format for monographs has been published in 1993 after discussing carefully the revised scheme of KORMARC format by the Korean Society for Information Management. The pre-note edition of KORMARC Description Rules for monographs, based on ISBD, was published in 1983, the revised pre-note edition in 1985, and at last A study on KORMARC Description Rules for Monographs by the Korean Society for Information Management in 1991.