In the early days, the diagnosis of cardiac disease, in addition to the history and physical examination, the most important ancillary diagnostic tool is cardiac catheterization. Today, various imaging tools, such as, ultrasound and computed tomography, gradually improved. To reduce harm to patients, diagnostic cardiac catheterization has declining importance in the diagnosis of the heart diseases, or has even been relegated to the second line. Fortunately, as medical materials getting rapid progress, interventional cardiac catheterization gets more expansive space in the treatment in recent years. Either in terms of quality or quantity, interventional cardiac catheterization has a very exciting development. This means the importance of the cardiac catheterization in the Children's heart diseases is undiminished, but the proportion, interventional cardiac catheterization gradually replaced diagnostic cardiac catheterization.