Head and neck is the concentration of important organs of human body, including central nervous system, the beginning of whistling and digestive system and organs of vision, hearing and speech, etc. It is a part with many kinds of organs, complex functions and special anatomical structure. Head and neck surgery treats tumors in this special area, which mainly includes three major types: neck tumors, oral and maxillofacial tumors and otorhinolaryngology tumors. Neck tumors: thyroid tumors, head and neck skin tumors (cancer, sarcoma, melanoma, etc.), thyroid hyoid cyst, parotid cyst and fistula, hemangioma, lymphoma, neurofibroma, nerve sheath tumor, carotid body tumor, lipoma, parapharyngeal tumor, metastatic carcinoma of the neck, lymph node lesion, some cervical esophageal cancer, etc. Oral and maxillofacial tumors: tongue cancer, floor of mouth cancer, cheek cancer, gum cancer, hard palate cancer, soft palate cancer, lip cancer, parotid gland tumor, submandibular gland tumor, sublingual gland tumor, mandibular tumor, etc. Otorhinolaryngologic tumors: laryngeal cancer, hypopharyngeal cancer (carcinoma of the larynx, posterior cricoid region, posterior hypopharyngeal wall), oropharyngeal cancer (including tonsil and soft palate tumors), nasal paranasal sinus tumors, maxillary sinus/bone tumors, etc. In summary, head and neck tumors include most of the head and neck tumors beyond the skull above the clavicle. It takes a long time to train a specialist in head and neck surgery, and the variety of diseases seen and the anatomical variation are large.