The problems of shoulder or elbow joint are very common clinically, especially in those throwing athletes. The so called minimally invasive surgery are the procedures which are performed through small skin incision in order to reduce damage to the human tissue. The patients will feel less pain after the surgery and the rehabilitation can be started sooner and better results can be expected. However, the surgical field would be limited through the smaller incision. This would increase the difficulty of the surgery. Therefore it is not suitable for all kinds of surgeries. The indication of minimally invasive surgery is limited. Moreover, the learning curve of the doctor is also longer. The arthroscopic surgeries are typical minimally invasive surgery. Due to improvement in the instruments, the application of the arthroscopic surgery expands a lot recently, especially in the sports medicine. It is also used widely in the treatment of problems of shoulder and elbow.