Purpose : The purpose of this study investigate method and effect of traditional hydrotherapy and therapeutic hydrotherapy. Methods : This is a literature study with books, seminar note and study for traditional hydrotherapy and therapeutic hydrotherapy. Results : Traditional hydrotherapy in Korea include balneotherapy, medicine herbs bathing therapy, hand and foot hot bath therapy, contrast bath. Therapeutic hydrotherapy include whilpool bath, Hubbard bath, contrast bath, pool bath using mechanical stimulation. Conclusion : Traditional hydrotherapy was static approach method with using water in motion, thermodynamics and water at rest. Therefore in modem hydrotherapy need more dynamic activities in the water. We need scientific research to prove effectiveness of physical therapy and traditional therapy which are known to everybody recently.