Due to the rapidly economy development in Taiwan, the industry environment changes of original equipment manufactures have been losing the advantages as they had before. Therefore, lots of Taiwanese enterprises start to have both OEM and build their own brands at the same time in order to find a way for surviving. However, there are few studies that have been examined the development process of original equipment manufactures to original brand manufacturing. Thus, the development process of original equipment manufactures to original brand manufacturing is the form the research question consciousness for this study. The case study of quality research is used as a research method. The study, as a further purpose, intends to provide the information for guiding and assisting the enterprises to examine the current situation and help the way to build their own brands. Besides this, the results of this study may supplement for the need of academic circles. However, the development processes of original equipment manufactures to original brand manufacturing are different for each enterprise in the case study of this study.