Objective To evaluate the prevalence of metabolic syndrome in the adults.Method 5811 subjects (including 3806 males and 2005 females,aged 20~83 years) were enrolled in this study.Blood pressure,TG,HDL- C and blood glucose of these subjects were collected and BMI was calculated.Results The prevalence of the metabolic syndrome and any component tended to increase with age.The rates of obesity and dyslipidemia were higher than hy- pertension or hyperglycemia.The prevalence of hypertension in man was higher than in women.The prevalence of hy- perglycemia in women was higher than in man.Conclusion Obesity and dyslipidemia play important roles in development of metabolic syndrome.The key way to prevent from metabolic syndrome is to reduce obesity and dyslipidemia,The prevalence of hypertension or hyperglycemia is different in man and women who are sufferers of metabolic syndrome.