This dissertation with the aim of developing a R.O.C new generation of psychological warfare decision-making mechanism is made up of three parts. Part I includes two chapters: the foreword and theory discussions, and part II comprised of chapter 3-chapter5 is the main body of this dissertation. Chapters 3-5 is narrating policy-making mechanisms of USA, China and Taiwan past and now. Part III are two chapters of designing a new psychological mechanism including a psywar information system for Taiwan and the conclusion.