Right lung atelectasis is a significant decrease in lung lobe volume, air content, and translucency in the right lung. It is most often seen clinically as a result of disease, such as tumors, granulomas, foreign bodies, and emboli in the airway causing compromised airway ventilation. Alternatively, pneumothorax may compress the lung and result in atelectasis. Right lung atelectasis can be treated by a comprehensive systemic therapy with relevant surgical modalities, medications, and especially bronchoscopy. In the case of malignant tumor, the tumor can be removed through surgery, and radiotherapy, chemotherapy, biotherapy, targeted therapy, and interventional therapy can be applied appropriately to relieve the condition and improve the symptoms of pulmonary asplenia.