According to statistics, the incidence rate of lung cancer in Beijing is 53.36 per 100,000, and based on a population of 18 million, there are as many as 9,600 new cases of lung cancer each year. With the development of science and technology, people have gradually deepened their understanding of lung cancer, and there are more and more new means of treating lung cancer. A lung cancer patient may face many treatment choices: chemotherapy, radiotherapy, argon helium knife, particle knife, gamma knife, radiofrequency knife, and scalpel, etc. A lot of scientific data shows that not all lung cancer patients must undergo surgery, and not the more expensive drugs are, the better the effect will be, on the contrary, there may be negative effects. The treatment of lung cancer needs to be standardized and individualized. I. How to achieve standardized treatment? 1. Differential diagnosis of lung cancer When an occupying lung lesion is found, a series of examinations are needed to distinguish the benignity and malignancy of the lesion. These tests include: chest X-ray, chest CT, blood tumor marker test, fiberoptic bronchoscopy and so on. Some patients may not be able to determine the benignity or malignancy of the lesion after all the examinations, and the final diagnosis needs to be clarified through surgical exploration. 2.Staging diagnosis of lung cancer After the malignancy of the lesion is confirmed, the size, location, invasion of other tissues, lymph nodes and metastasis of other organs need to be evaluated to classify the correct clinical stage of the tumor. 3.Standardized treatment of lung cancer Only patients with correct tumor staging can have a clear idea of what treatment measures to take. The Chinese Guidelines for Lung Cancer Treatment stipulate which stage of lung cancer should be treated for maximum benefit. II. How to achieve individualized treatment? In our daily life, we often encounter the situation of “different medicine for the same disease”. With the improvement of scientific research, people gradually realize that there are finer molecular typing of tumors, and the treatment methods for tumors with different molecular phenotypes are very different; moreover, tumors of the same pathological type respond differently to chemotherapy drugs due to individualized differences. In order to grasp the molecular type of each lung cancer patient in detail and select appropriate chemotherapeutic drugs to achieve the purpose of individualized treatment of lung cancer, the following tasks are required clinically: 1.Total molecular typing of tissue specimens obtained from blood sampling or surgery. 2. Blood sampling to test the mutation status of the patient’s chemotherapeutic drug genes and to understand the sensitivity to chemotherapeutic drugs in order to select the most effective individualized drugs.