Delayed speech and language development is treated according to the cause of the delayed speech and language development. If an infant has delayed language development, ask if there is any ischemic-hypoxic encephalopathy due to difficult birth or intrauterine distress causing asphyxia. If this is the cause of the delayed speech, the treatment will focus on functional speech exercises to nourish the brain cells. Delayed speech and language development can also be caused by a genetic disorder that results in delayed brain development, resulting in delayed language development and mental retardation. There is no special treatment, but mainly strengthen the language function training, let the patient read more, read the newspaper, at the same time can be given to enhance the memory calculation training. It can also be combined with oral drugs that nourish brain cells, such as piracetam and olacetam, to promote the recovery of brain function. In the case of delayed language development due to encephalitis that damages the cerebral cortex, anti-inflammatory, anti-viral and neurotropic drugs are given.