Several stages of neuroendoscopy in skull base lesion surgery: I. Treatment of skull base lesions limited to extracranial epidural and intracranial saddle is the first stage. Second, treatment of lesions that progress to the intracranial level but remain in the epidural area is the second stage. Third, treatment of lesions that break through the dura mater but remain outside the brain is the third stage. IV. Treatment of lesions that invade into the brain is the fourth stage. Fifth, the treatment of intracranial vascular lesions is the fifth stage. Huang Jun, Department of Neurosurgery, Xiangya Hospital, Central South University, China Direction of development and promotion of neuroendoscopic surgery: I. Comprehensive promotion of neuroendoscopic treatment of pituitary adenoma, optic duct dissection and decompression, chordoma, triple ventriculostomy, and intracerebroventricular cyst excision. To develop and promote neuroendoscopic treatment of craniopharyngioma, small and medium-sized meningioma in the midline of skull base, and substantial intracerebroventricular tumor. Third, to carry out independent or auxiliary use of neuroendoscopy to deal with surgical treatment of pineal area tumor biopsy or resection, trigeminal nerve microvascular decompression, auditory neuroma resection, and intracranial aneurysm clamping. Several research directions for neuroendoscopic devices: 1. Design of advanced robotic arms with oral control of endoscopic direction by the operator, reducing the need for a third hand. 2. Designing more sophisticated surgical instruments, so that they can be operated visually. 3.Provide better 3D imaging system. 4.The introduction of surgical robot system.