Many patients are afraid of knee surface replacement surgery, mainly because they mistakenly believe that the knee surface replacement involves removing all of their joints and replacing them with artificial joints. In fact, the surgery only removes one layer of the damaged part of the patient’s joint surface, and then an artificial joint of the same thickness can be installed on the surface of the excised lesion. 2. Patients are worried that they will be inactive for a long time after the knee surface replacement surgery and will need to be taken care of, but this worry is also superfluous. After knee surface replacement surgery, patients can walk for a short time on the first day after surgery with the help of crutches, and the range of motion will increase day by day. One week after surgery, patients are able to wash themselves and use the bathroom. Generally speaking, one week after surgery, patients can basically take care of their own lives. 3. Some patients are afraid that the surgery will fail, and we can understand this feeling. However, the knee surface replacement surgery is based on instrument positioning, and every operation during the surgery is instrument positioned and regulated. Of course, we also encounter a few special patients, and these peculiarities can be solved by careful preoperative design and intraoperative operational adjustments. If the selected prosthesis is of good quality, combined with successful surgery and reasonable post-operative rehabilitation, the intactness rate of the artificial joint surface replacement can be maintained at 90% after 20 years of use. In summary, knee replacement surgery is actually a safe and effective procedure that can maximize the quality of life of the patient.