The old Zhang master retired for several years, nothing to do and old friends tea, chat, play cards, chess, occasionally to his son to help look at the store, the days of leisure and leisure, and its happy …… old Zhang master has always been very good health, just smoking for a long time, every fall and winter will always be coughing, coughing up phlegm, the weather warmed up will be good. This year into the autumn of the old Zhang master’s old problems again appeared coughing, coughing up sputum, the beginning of his did not care, but the cough seems to be more serious than ever, and then observe the situation of the sputum, found that sputum sometimes with a little blood, the son and his partner also felt the old Zhang master cough, coughing up sputum more than the previous serious, lasted for a longer time, they persuaded the old Zhang master to go to the hospital to see a doctor to hospitals to do a chest CT and fibro To the hospital after chest CT and fiberoptic bronchoscopy, the diagnosis results let the old Zhang master family mood is very heavy, the old Zhang master suffered from “advanced lung cancer”, there is no chance of surgery. The family was in despair. Doctors suggested that they must go to see oncology specialists, and the family went to consult oncology specialists with the mentality of trying, and the words of the specialists made them rekindle the hope of overcoming the disease. Although surgery is still the main treatment for early-stage lung cancer patients, lung cancer mostly occurs in older people and most of the patients suffer from chronic lung diseases caused by long-term smoking, which increases the risk of surgery and makes it difficult to guarantee the postoperative recovery and quality of life; at the same time, the effect of surgical treatment is often unsatisfactory for middle- and late-stage lung cancer patients, therefore, radiotherapy is considered to be another curative treatment for lung cancer after surgery. Therefore, radiotherapy is considered as another curative treatment for lung cancer after surgery. Radiotherapy can be given to any kind of lung cancer at a certain stage of its development, but since radiotherapy is a kind of localized treatment, on the basis of emphasizing the comprehensive treatment of surgery, chemotherapy and radiotherapy, it should be tailored according to the patient’s specific conditions, so that radiotherapy should be the leading role when it is needed, and it should be the green leaf when it is the supporting role. Lung cancer patients must pay attention to the following aspects when choosing radiotherapy: firstly, as small cell lung cancer has metastasized early and is sensitive to chemotherapy, radiotherapy is not the first choice, chemotherapy should be carried out firstly, and then radiotherapy should be considered after 3 to 4 cycles when the lumps are reduced in size in order to get the best effect. Secondly, for patients with early stage non-small cell lung cancer (including squamous and adenocarcinoma), although surgery is still the first choice, for patients who cannot bear the burden of surgery due to underlying cardiac or lung disease, clinical studies have confirmed that precision radiotherapy can achieve similar results as surgery. Meanwhile, for those with locally advanced cancer but without distant metastases, radical radiotherapy in the direction of tumor eradication can achieve more satisfactory goals. Thirdly, for inoperable patients with locally advanced bone or brain metastases, palliative radiotherapy can effectively improve the quality of patients’ survival and relieve their pain. Fourthly, for any kind of patients diagnosed with lung cancer but cannot undergo surgery, radiotherapy should be given as early as possible. Radiotherapy alone or in combination with surgery as well as chemotherapy are both operable options, but they must be determined according to the specific conditions of the patients, and it should be noted that an appropriate interval must be given after surgery or chemotherapy, so that the patients can undergo radiotherapy after they have gained some recovery, in order to promote the overall therapeutic process. In order to improve the accuracy of tumor treatment and the effective protection of normal tissues, thus improving the survival rate and quality of life of patients, radiotherapy has successfully developed from conventional radiotherapy techniques to precise radiotherapy techniques represented by stereotactic radiotherapy, such as three-dimensional conformal and gamma knife. At present, 64% of lung cancer patients who cannot undergo radical surgery need immediate radiotherapy, 30% of patients need radiotherapy within 10 months, while only 6% of patients do not need radiotherapy. Radiotherapy has already played a pivotal role in the treatment of lung cancer. As long as it is properly applied, with the continuous refinement of radiotherapy technology, it is reasonable to believe that radiotherapy will bring a better spring to lung cancer patients. At present, Mr. Zhang has already received treatment and has already achieved stage-by-stage therapeutic effect, and the doctor is going to implement the integrated treatment of precise radiotherapy combined with chemotherapy and its molecular immunity and molecular targeting, we wish Mr. Zhang a speedy recovery.