When cardiac surgery first started, all treatments for congenital heart disease required open surgery. However, with the current advances in science and technology, treatment of some congenital heart diseases can be performed by interventional methods. What is interventional therapy? In layman’s terms, interventional treatment of congenital heart disease is a treatment between medical and surgical procedures, which can also be understood as the treatment of congenital heart disease without surgery. It is a treatment method to cure congenital heart disease by using a catheter to deliver the necessary instruments to the heart abnormality through the femoral artery or vein under the fluoroscopic view of a large X-ray machine. Although interventional treatment has the advantages of less trauma, faster recovery and shorter hospital stay, only a portion of congenital heart diseases can be treated with interventional treatment due to the limitations of operation techniques, methods and treatment devices. Therefore, the congenital heart diseases that can be treated by interventional methods have strict surgical indications and require the choice of surgical methods based on the advice of a specialist.