Anoscope is a kind of instrument used to check the rectum and anus lesions, is a common examination tool in anorectal department, is through a relatively slightly shorter a mirror, put into the patient’s anus, to observe the anorectal lesions. Commonly used disposable anal mirror and electronic anal mirror. Currently the most advanced is the electronic anoscopy, before doing anoscopy requires the patient to empty the bowels as much as possible, take the truncated position, through the hard mirror with a camera, from the position of the anal opening into the rectum and the lower end of the sigmoid colon in the direct vision of the anorectal tube and the lower end of the sigmoid colon, but also can take pictures, and can be enlarged in the image on the monitor, in the direct vision to observe the lesions. When doing anoscopy, it is important to control the indications, patients with anal fissure, anal stenosis, anal pain, try not to do anoscopy, in order to avoid increasing the patient’s pain or aggravate the condition.