This purpose of the present study is to explore potential benefits of Cardiovascular Disease (CVD) prevention in Taiwan. We make use of Population Attributable Risk (PAR) method and use Taiwan's data to estimate the economic benefits arising from improving the risk factor (hypertension) of CVD. If the patient of CVD could improve their condition of hypertension to ordinary standard, then the medical cost of CVD will reduce 27.72%. It means the medical cost of CVD can reduce 35. 1 hundred million out of the total medical expenditures of CVD 126.5 hundred million (estimates).