Purpose: The purpose of this study was to explore the method of constructing and using the differentiated National Competency Standards (NCS) for vocational education of persons with disabilities. Method: After analyzing components of present NCS that need improvement (e.g. unit of competency, level of competency, etc.) according to demand and specificity of vocational education and training of persons with disabilities, NCS for the disabled were constructed by referring to the results of existing relevant studies. In addition, following the analysis of overall conditions and problems involving vocational education of persons with disabilities according to the existing studies, advantage and significance of maintaining consistency between the analysis results and NCS for the disabled were discussed. Results: Although NCS for the disabled attempted to make improvement on the contents and system of present NCS by reflecting relevant demands, they are fundamentally based on present NCS. NCS for the disabled were constructed in six steps, classified into three detailed steps including (1) groundwork step, (2) step considering consistency of competency unit with learning modules, and (3) step of designing career development pathways and qualification based on competency level. Suggested methods of utilizing NCS for the disabled were (1) preparation of groundwork for national vocational education curriculum for persons with disabilities, (2) preparation of framework for work-study system through employment and career development, (3) reinforcement of collaboration among institutions related to vocational education of persons with disabilities, (4) facilitation of restructuring competency of professionals, (5) designing of qualifications based on process-oriented evaluation, and (6) increasing the use of present NCS. Conclusion: Functional implications of the two study topics (method of constructing and method of using NCS for the disabled) were discussed.