Objectives: This study is aimed to comprehend the differences between different reporting sources on common occupational diseases occurring according to profession distribution. Methods: Occupational disease case numbers, professions and occupational distribution between 1999 and 2001 from the records of labor-insurance compensation database, the physical examination of workers, the surveillance system of the Department of Health and the occupational injuries statistics of business units were collected and analyzed. Results: 1. According to special physical examination and classification health management, hearing loss caused by working in a noisy environment is the most reported occupational disease with 310 cases (88.1%). The cotton spinning industries and cement industries have the highest numbers of reported occupational disease cases followed by hospitals 2. According to the surveillance system of the Department of Health, occupational abnormal air pressure disease caused by working in an abnormal air pressure environment is the most commonly reported occupational disease with 1,448 cases (46.0%). The inshore fishery had the highest numbers of reported occupational disease cases followed by rice planting. Among the confirmed cases, pneumoconiosis was the most reported occupational disease with 85 cases (36.3%). Hospitals had the highest numbers of confirmed reported occupational disease cases followed by rice planting. 3. According to the occupational injuries statistics of business units, reported occupational injury cases are concentrated in manufacturing followed by construction industries. 4. According to the records of the labor-insurance compensation database, pneumoconiosis was the most commonly reported occupational disease. Totally, there were 22,225 cases (93.2%). Conclusion: All four reporting sources have their limitations, however, the study results of the distribution of occupational diseases may offer references and recommendations to labor inspection agencies in drafting the occupational diseases prevention inspection strategy.