Osteoporosis and bone density are not the same concept; osteoporosis refers to the name of the disease, while bone density refers to a certain parameter. Osteoporosis refers to the presence of a decrease in bone mass in the patient’s body, which in turn leads to a significant decrease in bone strength and bone density. Bone density refers to the amount of bone per unit volume of bone in a patient, and is a monitoring indicator of osteoporosis, but the two should not be confused. BMD is a monitoring indicator of osteoporosis, but the two are not to be confused. In the process of diagnosing a patient suspected of having osteoporosis, the patient’s bone density is measured. If there is a significant decrease in bone density and the patient has the relevant clinical symptoms, the patient can be diagnosed with osteoporosis. In the process of treatment, it is also necessary to monitor the changes in bone density regularly to clarify how effective the treatment of this disease is.