Intelligence testing in children is based on the problems and age of the child, and there are two types of tests: screening and diagnostic. Depending on the age, the 20-item behavioral neurological measure for newborns is commonly used to screen newborns with abnormal brain development. The Bayley Neurodevelopmental Screening for Infants is used for children 3-24 months of age, and the 50-item Abilities Screening for Preschoolers is used for children 4-7 years of age, primarily to understand the child’s intelligence level, which can be used as a reference for school entry. Diagnostic tests, commonly used, include the Bayley Infant Developmental Scale for infants and toddlers aged 2-30 months and the Geisel Developmental Scale for infants and toddlers aged 1-36 months. The Wechsler Intelligence Development Scale is divided into large and small age groups, preschool and 6-16 years old. Suitable for family self-assessment is the Pediatric Neuropsychological Development Checklist for ages 0-6 years, which is divided into five major parts to check, gross motor, fine motor, adaptive skills, language and social behavior. The standards that children should achieve at different ages are defined accordingly, and the items listed can be examined and scored in order to identify the gaps in children’s intellectual development and to provide early intervention training.