On the basis of［1］, this paper presents some of the applications of the yoyo model of general systems in areas of social science. Especially,in the research of scientific mind by making use of the yoyo model and its field structure and the dishpan experiment, we study the basic existence and their working mechanism of the four human endowments: self-awareness, imagination, conscience, and free will. At the theoretical height, we resolve the problem of how to establish motivation and self-confidence for a person to achieve high in life. This end has been a very important problem in the research of pedagogy.