Professor Ji Ho Song has published “Expert Systems for Fatigue Life Predictions (CD Included)” from NOVA Science Publisher, USA on July 3, 2007. Prof. Jeongyeob Kim (Chonnam Univ.) and Prof. Joonhyup Park (Tongmyung Univ.) participated as a co-author. The fatigue problem of materials is very important for the design of machine and structure, so many databases and software have been developed and marketed for fatigue analysis and fatigue life prediction, The authors have recently completed a practical expert system for predicting the fatigue crack life in fluctuating loads through long-term studies.