A: In the history of world education, Pestalozzi was the first educator who clearly put forward the slogan "Educational Psychology". He is convinced that human beings have a basic psychological law. Educational psychology is to find this law and raise education to a scientific level. Educational science should be based on the laws of people's psychological activities. (1) Education should adapt to children's psychological development. Put the purpose and theoretical guidance of education on the basis of the natural law of children's natural development. (2) Make the selection and compilation of teaching content suitable for children's learning psychological laws, even if the teaching content is psychological. Accordingly, he put forward the theory of factor education. (3) Principles and methods of psychology teaching. Teaching procedure and students' cognitive process are coordinated, and teaching is gradual. (4) Educators should adapt to children's psychology, mobilize children's initiative in learning, and let children become their own educators. Pestalozzi's educational psychology thought had a great influence on the trend of European educational psychology in the19th century.