This study was conducted to investigate the factors which are related to Bone Mineral Density(BMD) of female for prevention of osteoporosis. We measured the BMD of lumbar spine(L2-L4) and femoral neck in 4802 female, using dual energy X-ray absorptionmetry(DEXA; DPX-alpha. Lunar, U.S.A.). and then analysed the 9 factors-age group, body mass index(BMI), amount of smoking, drinking, exercise, sleep, and fast blood sugar-which are related to BMD of female. The following results were obtained : 1. In age group, T-score was the highest at 36－42(六七) years group in lumbar spine(L2-L4) and at 15－21(三七) years group in femoral neck. and then it was decreased rapidly after 43－49(七七) years group in both lumbar spine(L2-L4) and femoral neck. Therefore we concluded that T-score of female in lumbar spine(L2-L4) and femoral neck change according to age group in $ll$Hwangjaenaekyong Somun; 黃帝內經 素問$gg$. 2. In BMI, T-score of lumbar spine(L2-L4) and femoral neck were increased according to BMI increase. 3. In amount of drinking and smoking, T-score was highest in heavy groups(women who have drunk soju more than 4 bottles for a week) in both lumbar spine(L2-L4) and femoral neck. But there t was no significant difference in comparison according to age group. 4. In exercise, T-score was higher in exercising group than non exercising group. And it appeared that women who have taken proper exercise had higher T-score than women who have taken exercise daily. 5. T-score was higher in women who ordinarily sleep well in both lumbar spine(L2-L4) and femoral neck than sleep badly. And there was significant difference in 43-56 years group. 6. T-score was low in the group that exceed 110mg/dl in fast blood sugar. Conclusions : The age group in $ll$Hwangjaenaekyong Somun; 黃帝內經 素問$gg$ is related to BMD of women. And risk factors-BMI, exercise, sleep, fast blood sugar, thyroid disease-are related to BMD of women. Therefore we expect that this study will help for prevention of osteoporosis of women, and further study will be achieved.