Take the hip and knee joint as an example, artificial joint surgery is applicable to the following diseases: 1, degenerative hip and knee joint disease, resulting in joint pain and movement disorders caused by damage to the joint surface, such as hip and knee osteoarthritis; 2, secondary hip and knee joint disease caused by trauma, such as femoral neck fracture and femoral head necrosis, femoral condyles and tibial plateau fracture caused by traumatic arthritis of the knee joint 3, congenital joint disorders, such as congenital hip dislocation, developmental hip dysplasia; 4, other joint disorders caused by joint dysfunction, such as rheumatoid arthritis, ankylosing spondylitis, hemophilic arthritis, etc. All of the above joint diseases can be treated conservatively in the early stage of development, and if they are not effective, other non-reconstructive orthopedic surgeries, such as arthroscopy and osteotomy, can be considered. Only when all other surgical methods fail to solve the problem should reconstructive joint surgery, i.e., artificial joint replacement, be considered. The ultimate goal is to relieve the pain and improve the function of the joint, thereby significantly improving the patient’s quality of life.