1. Rest and psychological guidance: Avoid emotional excitement. For those who take oral medication, please inform the doctor and nurse, and the doctor will use the medication according to the need of the condition after the operation. If you do not sleep well before the operation, inform the doctor and use sedative drugs appropriately. Keep the ward quiet, instruct the patient to reduce activities and lie down appropriately to avoid physical exertion. (1) High-resolution ultrasonography, which is the first choice for evaluating thyroid nodules. Some patients may require fine needle aspiration cytology (FNA) before surgery to further clarify the diagnosis; (2) Ultrasonography: preoperative assessment of lymph nodes in the lateral cervical region to determine the surgical approach; (3) Laryngoscopy to determine the function of the vocal cords; (4) Patients with hyperthyroidism should Determine the basal metabolic rate. 3. Medication: Stop using aspirin and reserpine for at least three days before surgery to avoid abnormal coagulation and low blood pressure, which may cause life-threatening conditions. In addition, reducing the basal metabolic rate through medication is an important part of surgery preparation for hyperthyroid patients. Therefore, the medication must be taken strictly in accordance with medical advice. Diet: Eat high protein, high calorie and high vitamin food to increase nutrition and strengthen physical fitness, and hydrate but prohibit drinks with excitatory effects, such as strong tea and coffee. Patients requiring lymph node dissection in the lateral cervical region are advised to eat high-fat foods three days before surgery. 5.Eye care: Pay attention to eye protection, frequent eye drops, and avoid stimulation by bright light, sand and dust to avoid dryness and damage to the cornea after overexposure and ulceration (for hyperthyroid patients). 6. Pre-operative training: practice urination in bed, practice surgical position (neck hyperextension) 2-3 times/day for 30-60 minutes/time, and practice several times a day with a soft pillow before surgery to adapt the body to the neck hyperextension position during surgery. It can effectively avoid dizziness, headache, nausea and other symptoms of postoperative patients. If you feel uncomfortable during the exercise, please adjust the position and report to the doctor and nurse in time. 7. Deep breathing and coughing: Practice deep breathing and effective coughing to prevent postoperative pulmonary complications. 8. Skin preparation: Skin preparation is to clean the skin thoroughly to make disinfection more thorough and prevent post-operative incision infection. Therefore, if your hairline is too low and your beard is large, please treat it in time to avoid postoperative cut infection caused by incomplete skin cleaning due to excessive hair, and it is especially important for lateral neck lymph node clearance. 9. Pre-operative blood pressure control: Effectively control blood pressure to below 140/90mmHg before surgery. For hypertensive patients, take antihypertensive medication with a small sip of water on the day of surgery. 10.Control of blood sugar: Effective control of blood sugar to avoid non-healing of incision and even infection caused by high blood sugar.