The organs in the nasopharynx and throat are located deeper and have complex physiological structures, which are not easy to be directly detected and must be examined and diagnosed with the help of special examination equipment. Electronic nasopharyngeal laryngoscopy is an easy way to be accepted by patients because it is less irritating, less reactive and less painful, with high definition, convenient and easy to use, and short operation time. It discards the shortcomings of the previous examination equipment and can take biopsy and foreign body through the clamp channel at any time, which provides a reliable examination and diagnosis means for otolaryngology patients and can provide a reliable basis for early diagnosis and early treatment of various head and neck tumors, especially for patients who suspect or need to exclude nasopharyngeal cancer, electronic nasopharyngoscopy + nasopharyngeal biopsy is especially important. The nasopharyngeal laryngoscope is light and slim, with flexible follow-through and better insertion, which can directly penetrate into the nasopharyngeal cavity and is the best means to observe the surface mucosa of the nasopharynx and throat. With high-definition image clarity, flexible endoscopic operation degree, convenient endoscopic image storage and report output, nasopharyngoscope has become an important tool for clinicians to carry out head and neck tumor diagnosis and treatment. The clinical application of electronic nasopharyngolaryngoscope includes: hoarseness, coughing with blood; returning snot with blood, tinnitus, hearing loss; nasal congestion, runny nose, headache; swollen lymph nodes in the neck or breathing disorders; suspected foreign bodies in the nose, throat and pharynx; thick and short neck, enlarged tongue, difficulty in indirect laryngoscopy; snoring in sleep, long-term breathing through the mouth; cancer screening or searching for the primary focus of cancer (swollen lymph nodes in the neck). For those with enlarged lymph nodes in the neck, the nasopharynx, oropharynx, larynx and hypopharynx should be carefully examined.) Warm tip: Preparation for e-nasopharyngoscopy: the nasal turbinates must be contracted with furosemide and surface anesthesia with bupivacaine before entering through the nasal cavity. If the physician finds a suspicious lesion, a pathological biopsy must be performed to clarify the diagnosis.