Thyroid cancer lung metastasis patients can choose to undergo surgery, ¹³¹I treatment, external irradiation therapy, TSH inhibition, targeted therapy, chemotherapy, and so on. 1. Surgery: Generally, radical surgery is needed for the primary lesion of thyroid cancer. If it is single metastasis in one lung, it is feasible to remove the metastatic lesion; if it is bilateral multiple metastasis, it is necessary to judge whether there are indications for surgery according to the number and size of metastatic lesions. 2.¹³¹I treatment: a large part of patients have lost the chance of surgery when they find lung metastases, in which differentiated thyroid cancer has better iodine uptake ability and can be treated with 131 iodine radionuclide therapy. Generally speaking, patients with no distant metastases other than lungs and smaller metastases will have better results in ¹³¹I treatment. 3. External irradiation therapy: many patients with medullary carcinoma, non-differentiated carcinoma and partially differentiated thyroid cancer have lost the chance of surgery, and the effect of radionuclide therapy is not good, palliative radiotherapy can be carried out to slow down the progress. 4. Targeted therapy: patients with differentiated thyroid cancer with lung metastasis can be treated with targeted drugs such as Sorafenib, while patients with medullary carcinoma can be treated with drugs such as Carboplatinib. 5. Chemotherapy: if the lung metastasis of undifferentiated thyroid cancer belongs to stage IVC, paclitaxel combined with carboplatin and other programs can be used for systemic chemotherapy. It is recommended that patients diagnosed with thyroid cancer lung metastasis should consult the doctor in time, choose the appropriate treatment plan and take the medicine as prescribed by the doctor.