The formation of children's subject self and object self is the result of the interaction between babies and the material world and social environment. Self-development helps children to correctly handle the relationship with the environment and others, such as recognizing people's attitudes, experiencing others' emotions, establishing equal relationships, sharing social experiences and trying common goals. This is very important for individuals living in a highly social environment. The development of self-awareness is the turning point of children's socialization and the necessary condition for the final formation of personality.

The development of preschool children's self-awareness (self-evaluation, self-experience and self-control) develops with age. The occurrence of various factors of self-awareness has timeliness. For example, self-evaluation occurs at 3~4 years old, self-experience occurs at about 4 years old, and self-control occurs at 4~5 years old.