The research is to explore the competitive strategy of international research-based pharmaceutical company on ethical drugs in Taiwan. Through in-depth interview with selected experts from the pharmaceutical industry and competitive strategic analysis from Delphi Method, the findings are as follows: First of all, product innovation and research development are key factors for companies to achieve a competitive advantage through obtaining patent. Secondly, having an excellent field force and developing full control of market channels will strengthen business performance. Finally, local government policy tremendously affects the importing strategy of the international research-based pharmaceutical companies.