The invention discloses an intelligent building video intercom system adopting finger vein recognition. The intelligent building video intercom system comprises a power supply, a power supply driving circuit, a finger vein collection circuit, an SD card, an SD card interface circuit, a singlechip, an LCD display circuit, an LCD display screen, an audio output circuit, a horn, an RS 232 / 485 communication conversion circuit and an access controller, wherein the power supply is connected with the singlechip through the power supply driving circuit, and the finger vein collection circuit is connected with the singlechip; the SD card is connected with the singlechip through the SD card interface circuit. The singlechip transmits visual intercom information to the LCD display screen through the LCD display circuit, and then the visual intercom information is connected with the access controller through the RS 232 / 485 communication conversion circuit. The access controller controls the opening and closing of a door, and the singlechip controls logical communication between finger vein recognition and the circuits. According to the access control way disclosed by the invention, the finger vein recognition technology is adopted, so that the intelligent building video intercom system can accurately recognize control of users on an access system so as to guarantee safety of communities.