Stage 3 to 4 lung cancer needs chemotherapy plus targeted therapy after surgery, in addition, stage 2 lung cancer and some stage 1 also need chemotherapy or targeted therapy after surgery. Generally doctors will determine the treatment plan according to the patient’s own situation. Lung cancer treatments mainly include surgery, radiotherapy, chemotherapy and targeted drugs. Stage 1 and 2 lung cancer usually prefers surgery, stage 2 lung cancer and part of stage 1 also need postoperative chemotherapy or targeted therapy, stage 3 lung cancer can be treated with chemotherapy, radiotherapy or targeted drug therapy after surgery, and stage 4 is mostly advanced stage of lung cancer, and the treatment mostly chooses chemotherapy, targeted and immune drugs. Lung cancer patients should have a reasonable diet with high fiber, high protein and low fat. Patients should adjust their lifestyles in time, because lung cancer is closely related to smoking, so they need to quit smoking and drinking before treatment. Lung cancer patients with gene-specific mutation can choose relevant targeted therapy, and the targeted drugs include gefitinib and erlotinib hydrochloride. The use of drugs needs to follow the doctor’s prescription, and it should be noted that lung cancer patients can reduce the adverse effects of the disease through “early detection, early diagnosis and early treatment”, and many patients may survive for a long period of time, so it is recommended that the patients set up the confidence in the treatment.