The examination methods of osteoporosis are as follows: 1.X-ray light film: it can observe bone morphology and structure, localize and qualitatively diagnose and differentiate fracture, but the sensitivity and accuracy are low. Usually the bone volume is reduced to less than 30% before it can be revealed, which is a rough detection method; 2. Dual-energy X-ray absorptiometry: It is a recognized standard in the clinic, which can accurately and multi-dimensionally reflect the human bone density; 3. Imaging examinations: such as magnetic resonance, CT; 4. Laboratory tests: such as bone resorption and marker detection of bone formation.