Cognitive health is key for older adults to live independently, and exercise intervention can improve cognitive health.Exercise improves cognitive health through a variety of mechanisms, including improvement of cerebral blood perfusion, enhancement of brain capacity and connectivity, promotion of neurogenesis, and release of neurotrophic factors, miRNA and myokines.The exercise mode and dose can affect the effect of exercise intervention on cognitive health.Individualized exercise intervention with a duration of more than 12 weeks and a multi-mode combination is more conducive to improving the cognitive health of older adults.