As a result of investigating the cases of applying Yuk-mi-ji-hwang-tang-kakambang(六味地黃湯加減方) to treating dementia, the following results are obtained. 1. Yuk-mi-ji-hwang-tang-kakambang(六味地黃湯加減方)is applied to anapladementia. 2 Yuk-mi-ji-hwang-tang-kakambang(六味地黃湯加減方) is also applied to treating the dementia due to congenital weakness and defficiencies of the Liver and Kidney, the Spleen and Kidney. 3. To cure congenital weakness, Yuk-mi-ji-hwang-tang(六味地黃湯), Jwa-kwi-hwan(左歸丸), Bo-sin-ik-su-tang(補腎益髓湯) and Chil-bok-eum-kakam(七福飮加減) which can bo-sin-ik-jeong(補腎益精) sung-noi-ik-ji(醒腦益智), for the defficiencies of liver and kidney, Jwa-kwi-hwan-kakam(左歸丸加減), Woo- kwi-eum-kakam(左歸飮加減) and Ki-kuk-ji-hwang-tang-hap-jng-ji-tang-kakam(杞菊地黃湯合定智湯加減) which can bo-ik- kan-sin(補益肝腎) jeon-jeong-gun-noi(塡精健腦) and for the defficiencies of spleen and kidney, Hwan-so-dan-kakam(還少丹加減) and Kum-kwe-shin-ki-hwan-kakam(金궤腎氣丸加減) which can bo-sin-gun-bi(補腎健脾) ik-gi-sang-jeong(益氣生精) gun-noi-sang-su(健腦生髓) 4. Won-Ji(遠志) and Suk-chang-po(石菖蒲) which can sung-sin-ga-gu(醒神開竅) are added to yuk-mi-ji-hwang-tang(六味地黃湯).