Educational psychology is a practical and applied science with its own theories, research methods, problems and techniques. In 1980s, pre-school educational psychology developed from a research field to an independent discipline. The Creation of Educational Psychology: Educational Psychology was published in Thorndike on 1903, which indicates that educational psychology has become an independent discipline.

Preschool education psychology is a science that studies the general principles of children from birth to preschool education and the basic laws and characteristics of their psychological development.