Cryptorchid surgery can only change the position of the testicle so that it descends into the scrotum or closer to the scrotum. However, it cannot change the abnormal development of the testicle, nor can it make the fertility of this testicle become normal. It only creates a suitable physiological environment for the development of the testicle. Although the surgery cannot turn the cryptorchid into a normal testicle, there are still benefits for the pediatrician after cryptorchid surgery treatment, mainly in the following aspects: the normal temperature of the scrotum is about 2°C lower than the body temperature, which is the environment needed for testicular development. Cryptorchidism surgery is like sowing seeds into the right soil. It avoids cryptorchid reversal of necrosis and complete loss of function. Tumors occur later and are easier to detect and treat early in the scrotum than in the abdomen. The scrotum is cushioned and can avoid testicular trauma. Reduce the negative psychological impact. The cryptorchid is surgically altered to reach or be closer to the scrotum. A part of the cryptorchid gets developed and is about the same size as the good testicle on the opposite side. However, there are some children whose testicles cannot descend to the ideal position in the scrotum; and due to various factors such as endocrine factors and hormone receptor abnormalities, they cannot develop normally, and are even smaller than before the surgery, or have atrophied. This is manifested by the testicles being positioned higher than the opposite side and smaller in size than the opposite side, or even not touchable. Surgery cannot guarantee future fertility or prevent cancer. The older the treatment age is, the farther the cryptorchid is from the scrotum, and the poorer the testicle development is, the worse the long term effect is. Once the testicle has atrophied, surgery is also needed to remove it.