According to the results of a survey conducted by a large oncology hospital in China, most thyroid cancer patients have adequate, super-adequate or even excessive iodine intake, while only a few patients have insufficient iodine intake. Due to the differences between various regions and dietary structures, it is impossible to give precise data to guide lifestyle adjustments. However, it is recommended that patients adjust their diet to maintain a normal level of iodine intake, provided that iodine metabolism is monitored. What is the appropriate daily intake of iodine? The World Health Organization recommends 1000 micrograms per day, and the consensus of our scholars is 700-800 micrograms. China uses iodized salt, which contains 350 micrograms of iodine per 10 grams of salt, and the healthy standard for salt intake is 6 grams per day, so that in addition to iodine supplementation through salt, there is a need to increase some iodine-containing foods, such as kelp, nori and seafood. Among the methods of monitoring iodine metabolism, urinary iodine monitoring is the most convenient and feasible. Urinary iodine is also the best indicator representing dietary iodine intake, and the ideal level should be controlled at 100-200 μg/L. A healthy lifestyle includes a reasonable dietary structure, moderate physical exercise, a balanced psychological state, and abstinence from smoking and alcohol. This is also very important to prevent recurrence of thyroid cancer after surgery. Although thyroid cancer is a malignant tumor, it can still be treated with good results as long as it is given high priority, undergoes standardized surgery and necessary radioactive iodine treatment, undergoes scientific review, endocrine therapy and lifestyle adjustment.