Kidney cancer is more prone to metastasis, but early stage kidney cancer can be clinically cured with active treatment. Kidney cancer is a collective term for malignant tumors occurring in kidney, including primary kidney cancer and secondary kidney cancer. Primary renal cancer is the most common malignant tumor originated from renal tubular epithelial system, among which clear cell carcinoma accounts for the majority, accounting for about 85% of renal malignant tumors. One study reported that 65% of patients with renal cancer had limited lesions, while 16% had metastases. The incidence of metastasis is 48.4% for lung metastasis, 23.2% for bone metastasis, 12.9% for liver metastasis, 5.2% for adrenal gland metastasis, 1.9% for skin metastasis, 1.3% for brain metastasis, and 7.10% for other parts of the body in the order of incidence. If kidney cancer is suspected or diagnosed to be combined with metastasis, it is recommended to go to regular hospitals for a comprehensive assessment of the condition, follow the doctor’s instructions, choose the appropriate treatment plan and improve the prognosis of the patients, so as to avoid delaying the condition.