The purpose of this article is to analyze the theories of salary in the studies of business organization and public personnel administration. Though many researches of teacher salary systems have been piled up in pedagogy, there are very few research to analyze the effects of the theories of salary in business organization and public personnel administration. Single salary schedule is supported by human capital model, agency model, and lifecycle salary model. In early 1980\u27s, they have tried to replace merit pay from single salary schedule. Merit pay(performace-based pay) have been popular in private sector and was introduced into public civil service in the end of 1970s. Both opinions for and against merit pay are based on psychological...