In recent years, there have been great changes in Taiwan's fertility rate. The world woman has been known is changing wider wildly through woman's educational development and demographic high reliability. Woman is interested in everything out of the household. Will it be reference on woman's labor market opportunity, income and first wedding, then will be reference on woman's fertility attitudes and fertility behavior? In the study the ideal number of children represents woman's fertility attitudes. The purpose of this study was to probe the influence of education development on ideal number of children. The sample aged 15-64 yrs. selected is held by the research Institute of Bureau in 1980, 1990 and 2000. In order to assess the influence educational, first wedding, labor market opportunity, income, urbanization on ideal number of children. The result showed the first influence on ideal number of children is education level, second is first wedding.