Job rotation is usually considered as an on-the-job training. It involves moving employees from one job to another for the purpose of giving them broader experience. This breadth of knowledge is often needed for performing higher level tasks. The study is an exploratory research. By doing literature review and adopting qualitative research method, eight cases have been studied and interviewed in depth. The purpose of this research is to investigate how and to what extent the job-rotation program has been practiced by the Taiwan companies. The primary merits of job-rotation include job enrichment, job enlargement, providing employee motivation, increasing chances of promotion, equipping managers with broad experiences and international perspectives, effective human resource utilization, reviving enterprise culture, and preventing formation of self-seeking groups. On the other hand, extra training, lower efficiency, higher costs, and employee reluctance are the main demerits.