There is no clear judgment on how long an 80 year old can live, because the life expectancy of a person has a lot to do with his or her state of mind and physical condition, and needs to be judged comprehensively. 1. State of mind: current research shows that a positive and optimistic state of mind can reduce the occurrence of diseases, but also can improve the therapeutic effect or cure the disease, it is recommended that people maintain a good and optimistic state of mind to face life. 2. Physical condition: the life expectancy of people and their own physical condition has a great relationship, if you suffer from underlying diseases, can improve life expectancy if properly controlled, such as hypertension, diabetes, etc., pay attention to daily dietary control, can also improve life expectancy; the elderly, if they often exercise, will also help to extend the life expectancy. Eighty-year-olds can live as long as there is no accurate figures, the current level of medical care in China and the improvement of living standards, have helped to extend the life expectancy, the old man appeared uncomfortable symptoms recommend timely medical treatment, so as not to delay treatment, reduce the life expectancy of patients.