Children's intelligence measurement is divided into screening scale and diagnostic scale, as follows:

1. Screening scale: 1. Denver mental development screening scale: also known as DDST, judges whether there is the possibility of mental retardation by detecting children's reaction ability to people, things, actions and languages. 2, age simulation method: let the child draw according to the graphics, see how old he can reach the graphics drawn, to screen for mental retardation. 3, painting people experiment: let children draw people, can show the approximate IQ equivalent to the age level;

2. Diagnostic scale: 1. Geissel Development Scale: It tests children's IQ by testing their abilities of dealing with people, dealing with things, language and sports. If it is lower than 75, it is considered as mental retardation. 2. Wechsler intelligence scale: it is suitable for children and adults aged 4- 16, and measures their intelligence level through calculation ability, understanding ability, filling in forms, drawing, common sense, language and other aspects.