Postoperative care after radical nephrectomy for kidney cancer is crucial. While the patient is still unconscious from general anesthesia, comprehensive monitoring is essential, with close observation of vital signs including blood pressure, pulse, and respiration. Patients recovering from kidney cancer surgery are extremely vulnerable; thus, it is essential to scientifically and reasonably plan their diet based on their actual condition and physical constitution. A reasonable diet should be formulated, with no food allowed for 48 hours post-surgery. During the period when a gastric tube is in place, intravenous nutrition should be provided. Every activity post-surgery significantly impacts the recovery of the patient's condition, especially the first urination after surgery. Observing the timing and volume of urination is a crucial factor in determining the patient's condition.