Preschool education mainly refers to the education of children aged 3~6. Pre-school education is the second half of pre-school education or early education, which is connected with the previous o~3-year-old infant education and the subsequent primary education. This is an important and special stage of one's education and development. "Importance" means that it is the foundation period of a person's development, and many important abilities and personality qualities form basic characteristics during this period; "Special" means that this stage is the transition period of children's physical and mental development from the initial amorphous to the basic stereotypes, and then they can start learning and development according to social needs. Preschool education takes the theory of "three-dimensional balanced development of physical quality, intelligence and psychological ability" as the core, and extracts nine growth goals of children: security, willpower, sense of purpose, attention, memory, thinking ability, balance, strength and speed.

Early education refers to providing children with targeted guidance and training at the age of 0-6 according to the characteristics of their physical and mental development and sensitive period, laying a good foundation for the cultivation of children's multiple intelligences and healthy personality, paying attention to developing children's potential and promoting their all-round development in language, intelligence, art, emotion, personality and sociality.

There are two views on the division of children's age in early education: early education broadly refers to the education from birth to the age of 6 before entering primary school, and it is an education for children aged 0-6 to promote their harmonious physical and mental development, while ordinary children enter kindergarten at the age of 3, so early education for children aged 3-6 is also called preschool education. Narrow sense mainly refers to the early learning of children aged 0-3.