One and a half year old babies, the standard of intellectual development should look at the movement, language, psychology and other aspects, in order to determine how the baby’s intellectual development. 1. movement: parents can be in daily life to observe the baby’s movements, if the baby can hand food, can be randomly painted, or can be simple jumping and jumping, with the hand can lift the bottle, so the baby’s intellectual development is normal. 2. language: in the language of the parents said, you can observe the baby can be well understood, such as the father asked the baby to help take some things, the baby can understand what is said, and then take the things over. This shows that the baby’s ability to understand is very good, the intellectual development is also normal. 3. Psychological: If the baby can often imitate the actions of adults, can clearly express their emotions, happy when they laugh, unhappy when they are angry, for the life of things are curious, then the intellectual development of such a baby is also normal.