Dementia is a gradual degeneration of cognitive function caused by cerebral damage or diseases,which is far more serious than normal aging.Occurrence rate of dementia is rising year by year,which not only impairs severely the patients′physical and mental health and quality of life,but also brings about heavy nursing burden to families and society.In this article,the concept of dementia patients′engagement was introduced,together with its evaluation tools,and factors influencing their engagement degree,so as to provide new modes for caring of dementia patients in China.