1. The completion of movement (including fine and gross motor) requires the participation of the hands, such as: daily fetching, posture change, body balance and stability. If a child with cerebral palsy has poor upper limb function, its progress and prognosis will be seriously affected, but this is often neglected by parents. 2. The hand is an important sensory organ that can distinguish the nature of things, and it is also an important reactor and action evoker. Clinically, many children with mental retardation have abnormal muscle strength and tactile sensation in both hands, and cognitive improvement can be promoted through training and sensory stimulation. 3, the hand is also a tool for communication, gesture is an important part of human communication, when the normal development of language can not be highlighted its important role.