The most critical period for children’s intelligence development is from 0 to 3 years old, during which children’s intelligence development is in a continuous process of development and change, and is inseparable from parents’ education and inspiration. It can be said that the more parents pay attention to the early education of their children, the more perfect the development of the child’s brain. Mental development testing is an important way to detect brain development, including gross motor, fine motor, cognitive ability, language ability and social adjustment ability. By doing the mental development monitoring, we can find out the deficiencies of the child, so that we can educate the child in a timely and focused manner and make the child’s intellectual development balanced. Therefore, it is necessary to monitor the child’s intellectual development. Li Ling of the Children’s Health Care Institute of Jinan Children’s Hospital recommends that children within one year of age should be measured every three months, and every six months from one to three years of age.