To measure the IQ of children, you need to go to a professional medical institution, and you can use the IQ scale, and the scale is different depending on the age of the child. 1. There are many developmental scales commonly used by children, including the Bailey’s Early Childhood Development Scale, the Geisel Developmental Scale, the Wechsler Intelligence Developmental Scale, and so on, and the scales used are different for different ages. 2. Usually, you should judge your child’s intelligence development according to his/her growth and development, including gross motor, fine motor, speech and hearing, communication ability, social ability and so on. If you want to give your child an IQ test, try to go to a slightly larger hospital child health department, there are special doctors according to age, behavioral characteristics and other specific circumstances, choose the appropriate scale.