The purpose of this study was to develop and test the validity of the standardized Korean nomenclature of Nursing Outcomes Classification (NOC), developed by Johnson &Maas at the University of Iowa. The four phases of the study were: (1) translation of the NOC into Korean by the research team, (2) four nursing professors and eight nurses with various clinical backgrounds reviewed each nomenclature taking into consideration definitions and nursing activities. The modified Delphi method was used to determine the most appropriate nomenclature for each term; (3) Twenty four academic and clinical experts in nursing were given a questionnaire to rate each Korean nomenclature using a 5 point Likert scale ranging from very inappropriate to very appropriate; (4) the team determined the most appropriate Korean nomenclature for each class of the NOC. The mean validity score of 190 items was 4.54, but several nursing outcome had a score lower than 4.0. They included 'adherence behavior(3.3)', 'ambulation : walking(3.57)', 'transfer performance (3.57)', 'caregiving endurance potential(3.57)'.