A 2cm lung nodule requires evaluation of the nodule, and based on the results of the evaluation, a treatment plan is determined, including follow-up, surgical treatment, radiotherapy, and so on. Lung nodules are evaluated for their benign or malignant nature by clinical data, imaging, tumor markers, non-surgical biopsy, age, lifestyle habits, history of chronic lung disease, and family history. If a 2-cm ground-glass nodule has no obvious symptoms, it can be followed up every three months. If the nodule becomes larger and more solid, a biopsy can be performed to clarify the nature of the nodule and surgical treatment can be taken. If 2cm pulmonary nodules have surgical indications, such as short-term enlargement, accompanying symptoms, and nodule morphology can be malignant, early surgical treatment can be chosen. According to the results of biopsy, we can decide whether radiotherapy and other follow-up treatments are needed. When 2cm lung nodules are found, it is recommended that patients seek medical treatment as soon as possible and listen to the advice of specialized doctors.