Spring and fall are the best time to have the surgery, the temperature is not too cold and not too hot, it is not easy to have wound infection after the surgery, and the patient can get out of bed early to promote the recovery of gastrointestinal function and reduce the formation of deep vein thrombosis in the lower limbs. However, it is for elective surgery, such as gallbladder stones combined with chronic inflammation of the gallbladder or chronic appendicitis, as well as benign thyroid nodules, and benign diseases. In case of tumor patients, such as gastric cancer or colon cancer needing deadline surgery, the surgery should be performed as early as possible after the diagnosis is clear, and this case cannot wait until spring or fall should be operated as early as possible.