The treatment of liver metastases includes 1. treatment of local liver tumors and treatment of the primary disease. The treatment for local liver metastases depends on the number of liver metastases, their number and location. If the location of liver metastases is superficial, the number of metastases is within 1-3, and the metastases are confined to a certain lobe of the liver, the metastases can be removed by surgery and then treated with systemic therapy. In case of multiple liver metastases, the liver metastases can only be treated with chemotherapy, radiofrequency ablation or stereotactic therapy.2. Primary tumors, such as primary lung cancer, breast cancer, colon and rectal cancer, are prone to liver metastases, and the primary disease must be well controlled at the same time as the treatment of liver metastases. Such as lung cancer using chemotherapy, targeted drugs, etc., breast cancer using chemotherapy, endocrine therapy, etc.