Sensory integration is the integration of sensory and perceptual development. Sensation refers to the sensory organs of the human body, which respond to the properties of individual things that act on the sensory organs, such as smells, sounds, and colors of the human body. Perception is the overall response of the human brain to individual things. Sensory development is the basis for the baby’s autonomous activities and mental activities, including complex mental activities, such as generalization, organization, learning and other complex mental activities an indirect or direct basis. Sensory integration is actually a complex neuropsychological process in which the human brain unifies, interprets, plans, and summarizes sensory information from all sensory organs, including sight, touch, smell, hearing, vestibular, and proprioceptive parts, and it is the basis for all daily life learning and work. The human sensory integration ability is actually innate, the baby in the mother’s stomach, with the mother’s constant movement, will make their own fetal position adjustment to adapt to the movement. Sensory integration is developing at this time, with the main development being sensation, touch, smell and vestibular sensation. With the emergence of conscious movement after birth, the baby will begin to rise to a new kind of height, and this is when primary sensory integration occurs. If hand-eye coordination is needed, or bilateral body coordination is performed. The human sensory integration develops further into higher integration, which is the process of performing learning, performing overviews and performing all complex mental activities called higher integration. Sensory integration is actually divided into low and high integration. Low level integration refers to the appropriate response of the cerebellum and brainstem to input from the sensory organs. Sometimes changes in body posture, coordination between body organs, hand-eye coordination and bilateral coordination are actually commands issued by the cerebellum and brainstem after sensory integration. Higher integration means that the information gathered by the cerebellum and brainstem is communicated to the brain, and then the cortical and subcortical neural structures make a series of judgments based on the information provided, and then command the body to carry out more complex neurodevelopmental mental activities. For example, the ability to organize, to learn, to plan actions, to organize things, and to carry out commands are all part of higher integration.