OBJECTIVE: The purpose of this study was to develop a quality assessment domain and to determine its priority in Korea's Occupational Health Services. METHODS: We designed the study in a 3 phase approach. The first phase of the process encompasses making a list of measures for quality assessments by a thorough review of the literature. The second phase emcompassed the development of inclusion and priority criteria. The third phase of survey development was conducted during August 2008 and a questionnaire was administered to occupational health physicians covering 58 subjects. RESULTS: Finally we investigated 40 quality assessment measures, including 2 for structural domain, 17 for process domain, 21 for result domain in occupational health service. The 40 quality assessment measures divided into 2 parts. The early quality assessment part was 14 measures that including 8 measures for process domains and 5 measures for result domains. CONCLUSION: We investigate a quality assessment domain and determined the priorities of the occupational health service in Korea.