There is no such thing as the best test for laryngeal cancer. Laryngeal cancer can be examined by laryngoscopy, imaging examination, tissue biopsy and other examination methods. 1. Laryngoscopy: including direct laryngoscopy, electronic laryngoscopy, fiberoptic laryngoscopy, etc., which can observe the deep structure of pharynx and can directly observe the morphological characteristics of tumor in the pharynx. 2. Imaging examination: including lateral laryngeal X-ray film, laryngeal tomography, CT scan of the larynx and MRI examination, which can help to understand the scope of tumor involvement, whether the parapharyngeal space is involved or not, and whether the subglottis is involved or not, as well as the scope of involvement. 3. Tissue biopsy: Biopsy biopsy is the main basis for confirming the diagnosis of laryngeal cancer. The specimen can be collected under indirect laryngoscopy, direct laryngoscopy or fiberoptic laryngoscopy, which is crucial to the determination of the nature of the tumor. When the patient is in discomfort, it is necessary to confirm the diagnosis in time and treat it actively.