Can a child’s intellectual development be measured? Is it possible to measure it with instruments? Many parents often ask this question. While a child’s weight and height can be measured with a scale or ruler, a child’s intellectual development can be measured with an IQ test. Intelligence tests are designed based on the typical performance of children’s intelligence development at various ages in normal children, and these items reflect the child’s ability in all aspects of neuropsychological development in a more comprehensive way. These items reflect a more comprehensive picture of the child’s neuropsychological development in various aspects, such as gross motor skills such as head lifting, sitting, crawling, standing and walking, hand fine motor skills such as holding small objects (e.g. small sugar pills), building blocks, writing and tying live knots, language development and cognitive aspects such as observation, memory, imagination and thinking skills, social skills such as spontaneous smiling and imitating household chores. The children were then tested in normal age groups, and the results were quantified for each age group as a normal criterion for completing these items. The results are then quantified. Later, the children are tested under the same conditions, and the results are compared with the normal standards to assess the level of intelligence development of the children. The results of an IQ test only reflect the child’s situation at the time of the test, but cannot predict the future level of intelligence. The results of the test are affected by various factors, such as the attitude of the subject, the subject’s health, emotions, and mental health.