This study aims to understand the prevalence rate of metabolic syndrome of the women aged above 40 in Taiwan and explore the factors that may affect the metabolic syndrome. Adopting cross-sectional study design, the research data of this study is taken from the Survey Research Database for the Prevalence Rates of Hypertension, Hyperglycemia and Hyperlipidemia of the Bureau of Health Promotion, Department of Health, Executive Yuan in 2002. The diagnoses for the metabolic syndrome are from the Diagnostic Criteria 2007 proclaimed by the Bureau of Health Promotion. And the statistic analyses used in this study include: descriptive statistics, chi-square test and logistic regression analysis. Besides, this study divides the study samples into total samples and post-menopausal women samples subdivided based on the total samples. There are 1324 women in the total samples, aged 53.25 averagely; and there are 681 women in the post-menopausal women samples, aged 60.59 averagely. Based on the metabolic syndrome criteria of the Bureau of Health Promotion, Department of Health, Executive Yuan, the research results find that the prevalence rates of the metabolic syndrome of the total samples and the post-menopausal are respectively 2.1% and 3.2%. Statistically, for women at different age groups and regions, there are significant differences in the terms of whether the women are in menopause and whether their parents have cardiovascular disease or diabetes. It is found that the women groups aged above 40 are easier to enter into high risk period of metabolic syndrome, which can be provided to relevant health authorities for references, in order to offer preventative propaganda and more suitable care for the women aged above 40 at different age groups and regions.