High or low paid workers will cause psychological nervous. About the 1970s there have been management theory burgeons situation, such as represented by Simon's decision-making theory, in order to enjoy Leeming Cibo Ge economic role as the representative of the school, to Peter Drucker and other man-made or on behalf of the school experience called the case school, represented by Lu Sangsi contingency theory school, the social system represented by Barnard school, etc. to the late 20th century, there has been more specific management theories, such as Deming's total quality management, Bohr's strategic management, Bideshengji learning organization, etc.