Osteoporosis is a systemic bone disease characterized by reduced bone mass or/and destruction of the microstructure of bone tissue, decreased bone strength, increased bone fragility, and high susceptibility to fracture. The disease is more common in women than men, and is commonly seen in postmenopausal women and the elderly. In addition, low body weight, low sex hormones, smoking, excessive alcohol or coffee and carbonated beverages, lack of physical activity, and lack of calcium or vitamin D in the diet can cause osteoporosis. In addition, diseases that affect bone metabolism, such as hyperthyroidism, diabetes, dry syndrome, chronic kidney disease leading to renal malnutrition, as well as gastrointestinal diseases, blood system diseases, neurological diseases, organ transplantation, etc. can cause osteoporosis. Osteoporosis is called the “silent killer” because people cannot feel the slow loss of bone mass, and there are no symptoms in the early stage. Unlike acute myocardial infarction and cerebral hemorrhage, which are immediately life-threatening, and unlike malignant tumors, which come and go in a hurry and are dangerous and frightening, they are taken seriously. The ultimate outcome of osteoporosis is a fragility fracture, which can easily occur even with minor trauma or without trauma. Before the fracture occurs, patients usually have no obvious conscious symptoms, and early diagnosis is of critical importance for the treatment of osteoporosis. Currently, the standard clinical method for diagnosing osteoporosis and predicting osteoporotic fractures is dual-energy X-ray absorptiometry (DXA) for measuring bone mineral density (BMD), which has the advantages of receiving fewer rays, being relatively inexpensive, simple to perform, and reproducible for both adults and children. the risk of fracture increases 1.5 to 3.6 times for every 1 standard deviation decrease in DXABMD. According to the latest treatment guidelines of the National Osteoporosis Foundation, BMD testing is required for the following groups: postmenopausal women over 65 years of age, who are at risk for osteoporosis despite preventive measures and should be treated accordingly if osteoporosis is present; postmenopausal women younger than 65 years of age with one or more risk factors; postmenopausal women with postmenopausal women with fragility fractures; women who require treatment based on BMD measurements; women on long-term hormone replacement therapy; men with fractures after minor trauma; people with bone loss on X-ray and patients with other conditions that can lead to osteoporosis.