The purpose of this case-control study is to investigate the relationship between storke and stroke risk factors, such as family history and past history. The case-control study over clinical data registered from Daejeon Oriental Medical Hospital in the period of November 2006 to July 2010. Study subjects consisted of 108 patients with acute stroke within 1 month as the case group (Cases) and 108 people who visited hospital for health care as the genreral control group (Controls). The participants had been interviewed by residents to find out their family history and past history. Their blood was taken to check the blood lipid level and liver function. 1. The people whose family history included cerebrovascular accident had more probability of stroke than the people who did not have cerebral vascular accident as their family history. 2. The people who suffered from hypertension had more probability of stroke than the people who did not suffer from hypertension. 3. The people who suffered from diabetes mellitus had more probability of stroke than the people who did not suffer from diabetes mellitus. Based on this study, the people who had cerebral vascular accident as their family history should thoroughly treat their blood pressure and blood sugar level to prevent the cerebral vascular accident.