A pulmonary shadow (solid occupancy or small nodule) is a relatively common diagnosis, which means that a mass in the lung has been detected from an X-ray chest film or CT, but it is not certain what the mass is. In fact, the vast majority of solid occupancies in the lung are inflammatory pseudotumors, tuberculomas, or lung cancer. If it is an inflammatory pseudotumor, which is the most fortunate case, anti-inflammation is sufficient. If it is a tuberculoma, anti-tuberculosis will also achieve treatment in most patients. However, once the most unfortunate possibility – lung cancer – has occurred, early surgery is its only hope for cure. Unfortunately, the nature of a solid occupancy in the lung is often very difficult to determine, and doctors’ advice is often to “Wait and See”, or to treat it first with anti-inflammatory therapy and then try something else if it doesn’t work. This is because it does not seem worthwhile to open the chest simply for an occupancy of unknown nature. As a result, the patient has to wait and see how the disease progresses and suffer in a mood of imminent “pronouncement”. As a result of such treatment, while some patients escape an operation, others lose the best time to treat lung cancer. Thoracoscopic surgery solves exactly this contradiction and allows for easy diagnosis and treatment of solid occupations in the lung. Specifically, for such patients, thoracoscopic resection of intrapulmonary masses is performed. If the intraoperative rapid pathological examination returns benign, all are happy to suture the wound back to the ward and the patient can be discharged in a few days with minimal surgical damage. If unfortunately it is a malignant tumor, then radical resection of lung cancer can be performed immediately under thoracoscopy, i.e. there is no delay in treatment and the surgical blow is far less than that of ordinary open-heart surgery. It is the preferred means of treatment for solid occupations in the lung. The above mentioned methods have become the standard treatment for solid lung occupations abroad.