After World War II, the population of growth occurred from 1946~1964 called ’baby boom’. Most countries had the current situation, the postwar ‘baby boomer’ brought main production in 20 years, however, after half-century people got elder and most of them retired, because the standard of medical care increased and the consequential result is people’s average life age were prolonged. In spite of living spaces being limited, nevertheless the growth rate of the population is still increasing, except for the improvement of medical skills, people focus on the knowledge of nutrition and healthy theme and care about themselves more than in the past years.