With the continuous development and increasing maturity of nasal endoscopic surgical techniques, nasal endoscopic surgery is no longer limited to the nasal cavity and sinuses, but gradually expanded to the skull base, orbit and nasopharynx and other regions. This saves patients from the pain of craniotomy, nasal and facial scars, bleeding, trauma and risk of complications, reduces the economic burden of patients and significantly improves their survival quality of life. The endoscopic sinus-related surgeries carried out in our department include: transnasal lacrimal sac rhinostomy for chronic dacryocystitis, transnasal orbital decompression for malignant proptosis, transnasal optic nerve canal decompression for traumatic visual impairment, transnasal skull base orbital nasopharyngeal tumors (e.g., entropic papilloma, olfactory neuroblastoma, angiofibroma, etc.) resection, transnasal endoscopic hemostasis for refractory rhinorrhea, giant nasal septum perforation repair, transnasal cerebrospinal fluid nasal leak repair, etc.