Arthroscopy is a kind of endoscope applied to joints. It is applied to the examination, diagnosis and treatment of injuries and diseases of various joints of the human body, which is called arthroscopy.After the 1970s, the research and application of arthroscopic equipments and techniques gradually entered a new stage in the international arena, and the application scope of arthroscopy was developed to the knee, shoulder, elbow, ankle, wrist, hip joints as well as small joints of the foot and the hand, the intervertebral joints, and extra-articular surgeries.At the end of 1980s, the shoulder arthroscope was not only used to In the late 1980s, shoulder arthroscopy was not only used to improve the level of diagnosis, but also began to carry out more microscopic treatment, and achieved very satisfactory clinical results. In 1931, Burman proposed shoulder arthroscopy for the first time on the basis of arthroscopic observation on cadavers. After more than 70 years of development, shoulder arthroscopy has gradually become an important method for diagnosis and treatment of shoulder joint diseases. Shoulder arthroscopy can observe some lesions inside the shoulder joint and under the acromion under direct visualization to make a clear diagnosis, make up for the shortcomings of the traditional X-ray and CTMRI, and can directly perform surgery under the microscope or guide the selection of incision surgery method. Surgery under shoulder arthroscopy maintains the original anatomical and physiological structure of the joint, with little trauma, high accuracy, and fast postoperative recovery. Shoulder arthroscopy has become the best diagnosis and treatment method for many shoulder joint diseases, such as glenoid labral tear, rotator cuff disease, and shoulder joint instability.