Objective : This study was designed in order to support the standpoint that dementia will be treated better by remedy for heart rather than for brain, liver and kidney in Korean Medicine. Methods : We investigated which of five viscera make dementia from original texts about it. Then, 15 aged men living alone in Yeongdong-gun, Chungcheongbuk-do were treated for dementia by herb remedies, acupuncture and moxa. After it, we verified through method, for example, SMMSE-DS, CDT, and etc. Results : We had results that the main viscera causing dementia is heart, and heart is related with gall bladder, spleen, and kidney according to philological method. Clinical testing in this viewpoint showed satisfactory effects on the diseases. Conclusion : From the results, we proved it could be a new way of remedy for dementia that main the viscera causing dementia is heart in Korean Medicine.