Borderline intelligence at the age of 6 is treatable, mainly through rehabilitation and education, psychotherapy, and medication. Borderline intelligence refers to those who have an IQ value of 70~90, which is in the state between normal and abnormal. The treatment for these children is mainly to help them adapt to life, socialization, learning, work, etc. Children aged 6 (preschool) can be appropriately close to normal intelligence through treatment, but there will be no essential change in intelligence. 1. Rehabilitation training and education: School teachers, parents and trainers work together to help children acquire cultural knowledge, daily living skills and social adaptation skills that match their intelligence. 2. Psychotherapy: Intervene in the child’s abnormal emotions and behaviors, reduce the aggressive/self-injurious behaviors of some children, and alleviate anxiety/depression. 3. Medication: to determine the cause of the disease, such as hypothyroidism and its replacement hormone, or even part of the cranial brain structural problems need to be treated with surgical procedures, the emergence of some mental disorders, it may be necessary to take anti-psychotic drugs under the guidance of the doctor (eg, buspirone anti-anxiety, methylphenidate treatment of attention-deficit hyperactivity disorder, etc.). In conclusion, the most important thing for a child with borderline intelligence is early detection and early intervention to improve the child’s social learning and work skills with the help of professionals. Often, good intervention is extremely helpful to the child’s growth as well as his/her future quality of life in adulthood.