The purpose of this study was to explore the invention methods and processes of the inventors in the R.O.C. 18 subjects were used for this study. A qualitative research method was employed for in-depth interviews of the inventors. Qualitative analyses were also made of the invention method and processes of these inventors. The findings of the study were as follows: 1. The idea for the invention could come from the work of the inventors, from friends' suggestions, daily observations, or in response to problems. 2. For making breakthroughs, inventors rely on their own learning, work experiences, continual experimenting or application of principles related to other things. 3. Most inventors think that the key factor to account for their success is perseverance. 4. As inventors become more experienced, the time required for each invention becomes less and less.