Notch or human skin in medical device installation suture closure tissue are disclosed. The robotic suturing device can provide the first and second arc needles. Once being properly positioned, the first and second arc needles are crossed hypodermic layer, or by superficial surface, two parts skin is connected. It does so with arcuate fashion and in identical and symmetrical rate angular displacement. In doing so, which is pushed to each other, so that it is guaranteed that two sections of skins of horizontal and vertical alignment. During promoting or retracting the first and second arc needles, suture is directed to spiral orientation between the first and second parts of skin, and from plane or more flat serpentines. The sewing process of generation is thus much to be faster than traditional or manual and has led to excellent wound approximation/alignment, this will lead to reduction scar, equipment compared with the prior art.
