Little Qiqi (pseudonym) is a 6-year-old northeastern boy who was born with a wobbly walk, constant drooling, temperament, inattentiveness, and difficulty speaking. At the age of six months, his parents took him to a hydrocephalus hospital for a cranial examination and found a huge cyst in the posterior cranial fossa and moderate hydrocephalus in the brain. Within 6 years, his parents took him to hospitals around the world for treatment of hydrocephalus and rehabilitation, spending nearly 100,000 yuan a year on rehabilitation, and 600,000 yuan over 6 years, but his symptoms did not improve significantly. Finally, Xiaoqiqi’s parents brought their child to the hospital for help and treatment. Through a series of examinations, it was found that Little Qiqi’s cognitive development was significantly worse than that of children of the same age because of a huge cyst in the posterior cranial fossa compressing the cerebellum causing Little Qiqi to walk unsteadily, while the ventricles of the brain were enlarged, resulting in brain dysfunction. According to the general treatment routine, a posterior cranial fossa cyst should be treated with a ventral shunt first. However, the ventricular system of the brain and cerebellum are not connected, so ventral shunt of the cyst cannot solve the problem of hydrocephalus in the brain, nor can it solve the problem of intellectual development of little Qiqi. Based on the experience and comprehensive analysis and judgment, we decided to do ventriculoperitoneal shunt for hydrocephalus first, using the international more advanced extracorporeal adjustable pressure shunt tube for ventriculoperitoneal shunt. One week after the operation, little Qiqi stopped drooling, could communicate with his parents emotionally, could concentrate, and could look at pictures and communicate with others. Little Qiqi’s parents shed tears of joy. At present, little Qiqi has been discharged from the hospital and will have a cystic abdominal shunt in 3 months to solve the problem of unstable walking.