Based on the characteristics that most patients in Vocational Rehabilitation Department of Guangdong Provincial Work Injury Rehabilitation Hospital are patients with occupational injuries, the paper analyzes the hospitalized business process, concretely introduces the main functional modules, design framework, safety requirements, database design, etc. of the vocational competency assessment system. The application of this system provides references for rehabilitation doctors and vocational rehabilitation therapists to make training schemes, strengthens patient information management, improves working efficiency and service level.