A system for improving brain function includes a brain-function-improving content storage unit that subdivides content for judging the degree of activation of human brain function into multiple classified regions and levels, and stores the subdivided content； a content selection unit that selects the content stored in the brain-function-improving content storage unit for each region according to a predetermined classification method； and an achievement determination unit that determines achievement of a user based on scores acquired through feedback provided by the user for the content selected by the content selection unit. The system may have the effect of protecting subdivided inherent functions of the brain, preventing disorders caused by accidents or diseases, recovering the inherent functions and disorders through analytic diagnosis and repeated study, and training and improving the cognitive ability of significantly impaired portions of brain function by subdividing the inherent functions of the brain.
