It is the question of "what to study" that researchers should think about when they are engaged in an educational scientific research. In practical research work, research topics are often manifested as research problems, which are problems discovered and solved by researchers in scientific research. Research topic is the premise of research.

The purpose of the study is to expand the theory, such as the construction, development and perfection of the new theory and the test or breakthrough of the original theory. It is of great significance to explore the laws of preschool education, develop preschool education science, and establish and gradually improve the discipline system of preschool education.

Improve the quality of preschool education, promote the professional growth of preschool teachers, the healthy development of preschool children, and improve the social and economic benefits of research results. The ultimate purpose of research should be practical purpose, and the theoretical purpose and practical purpose of research should be complementary.

It is required that the problem research should be based on and serve the society. Developing preschool education, serving parents and promoting the healthy development of preschool children should be the core purpose of preschool education scientific research. Putting preschool education research under the social background is conducive to improving the teaching quality of preschool education.

Preschool education research is a branch of educational science, and preschool education research is an integral part of educational research. It is to explore the cognitive process of preschool education science, reveal and discover the objective laws of various phenomena in preschool education field, and study the knowledge system of preschool education science. This book is a review and study of preschool education science.