Abstract: Objective In order to overcome large volume, no light, blind into the mirror, unable to locate faults, easily misdiagnosed of the common anal diagnosis instrument, multifunctional portable video electronic anus diagnosis instrument is developed.Methods DaVinci technology is applied in medical video development. Electronic anus diagnosis instrument includes micro camera, LED light source, display device, DaVinci chip, etc. A LED lamp aperture in the inner wall of the tube can increase the clarity of the image. The lower end of the handle is provided with a scale anoscopy, which can be prepared to judge the position and the range of the disease, so as to improve the accuracy of the examination.Results Portable electronic anal diagnosis instrument is portable, visible and can be located. It can observe the multi position of the inner cavity of the anus and the wall of the rectum with real-time record store image and high quality of image acquisition.Conclusion It provides new technology for the diagnosis and treatment of anorectal deep source of disease.