Life table is a convenient tool for depictong the mortality process of a population.The characteristics of four common types of life data,i.e.complete data,right\|censored data,left\|censored data,and interval data are introduced.Three methods for constructing life table,i.e.Life Table Method,Product\|Limit Estimation,and Turnbull Estimation regarding to these tyes of life data are presented.Comparisons are made on the features of the Life Table Method and the Product\|Limit Estimation in life table constru...