Objective To study the characteristics of intelligence quotient in adolescents with functional mental disorders. Method A total of 152 cases were tested by Wechsler Child Intelligence Scale or Wechsler Adult Intelligence Scale-revised in China. Results 1)FIQ:90.17±18.43,the cases were mainly with marginal intelligence quotient(45.39%).VIQ(95.86±17.81)＞PIQ (85.73±17.57).There were 85 adolescents with balance between VIQ and PIQ,which accounted for 55.92% of the total amount.2)There were differences about PIQ and FIQ among schizophrenia group,mood disorder group,and neurosis group (P<0.05).The scores of PIQ and FIQ in schizophrenia group were lower than those of mood disorder group and neurosis group (P<0.05). Conclusions FIQ in adolescents with functional mental disorders are not high,intelligence structure development are balanceable.There are respective characteristics on intelligence quotient among schizophrenia,mood disorder,and neurosis,these may help us to make targeted interventions.