In recent years, the world's population has gradually been skewed to an aging society. Osteoporosis become one of the many serious chronic diseases in the world. Patients usually have severe fractures when they go to the hospital for treatment This project aimed on how to achieve accurate and rapid detection of bone density. This project has achieved several goals: A safe andnon-invasive bone density detection system, multi-site bone density prediction andsimple and rapid measurement. This measurement method will be more conducive tothe collection of bone data and the establishment of the bone density database in Taiwan.