1. It's much faster than suturing by hand, shorten operation time. 2. It's more accurate and consistent. 3. For surgeons, it's easy to operate, no need for much training. 4. Reduce the cross infection of skin wounds. 5. Staples with different diameters can be applied to sewing different operation incision. 6. While sewing, the incomplete closing of staple helps the concrescence of the operation incision. 7. Reduce the operation cost.