In 1980s, Japan's economy made remarkable achievements. While analyzing its economic and political development factors, people are also very concerned about Japanese education. Many foreign researchers believe that the success of Japan's modern economy is the result of its high literacy rate and improved education level. After World War II, the Japanese government and people have been discussing a topic: the theory of educational investment. According to this theory, education expenditure should not be regarded as consumption, but as investment. This thought has profoundly influenced the decision-making of a generation of Japanese government and parents' educational view, and the whole society has set off the climax of educational reform. It is in this context that a number of influential educators have emerged. Do Hu Hui is one of them. As an outstanding educator in Japan, Professor Toohui has made great achievements in the research of children's psychological and mental development. Different from many scholars who are good at theory, Hu Hui's educational thought is more pragmatic, pointing to the specific practical problems of children's education and putting forward many constructive suggestions. Do Hu Hui used to be the principal of a primary school attached to a university, which gave him the opportunity to meet many primary school students and began to investigate the social environment and family environment around modern children. During this period, he began to rethink what education is. As a key place for children's growth, does the family really play its due role? Hu Hui believes that the best way to improve children's ability is to let parents become "educational practitioners". We should not only understand children's unique psychological dynamics, but also explore ways to educate children in life and study practice according to their personality characteristics. Hu Hui believes that the best way to cultivate children is to let parents become "educational practitioners". His educational thought is simple and practical, which is deeply loved by people and has influenced the way parents educate their children from generation to generation. Hu Hui's works, from fetus to primary education, from educational psychology to specific educational behavior, are all discussed in detail, which can be described as an encyclopedia of children's education, including maternal love promoting physical and mental health, how to develop children's ability, the skills of disciplining children, and the learning guidance method.