Micro nodules in the lower lobe of the right lung can be seen in respiratory medicine, medical oncology, and thoracic surgery. Micronodules are nodules smaller than 5 mm, mostly benign chronic inflammatory changes, no clinical symptoms, mostly found during physical examination, no special treatment is needed, only dynamic follow-up chest high-resolution CT once a year is needed. If the nodules show growth changes, especially if they are larger than 6-8mm or more, accompanied by lobar, short burr, pleural traction sign, pleural depression sign and other changes, it is necessary to be alert to the possibility of early lung cancer. Further chest enhancement CT examination can be performed, and joint consultation with respiratory medicine, medical oncology and thoracic surgeon can be requested to understand whether the patient needs dynamic observation or early treatment with surgical resection. Therefore, pulmonary micronodules belong to the imaging manifestations of multicenter consultation of respiratory medicine, oncology and thoracic surgery, and need specific close follow-up to avoid missing diagnosis.