By analyzing the data of death rate of the heart and brain disease in Beding area from 1987 to 1996. It is found: 1) the death rate of the heart and brain disease is the highest, and the death rate increases with age increasing, the death rate reaches its peak within the age of 70~74, meanwhile, death rate for males is greater than for females; 2) the annual change of death rate of the middle and older people is in reverse with the air temperature at the same period; 3) there exists correlation between the ...