The invention relates to an elevator and video intercom integrated control system and a working method of the elevator and video intercom integrated control system. The elevator and video intercom integrated control system comprises a video monitoring system, a video intercom system and an elevator control system. The video monitoring system comprises a hub and a plurality of cameras, wherein the cameras are connected with the hub. The video intercom system comprises a video intercom indoor unit, wherein the video intercom indoor unit can send out an elevator taking application at home or in the office, and is connected with a fault self-detection circuit, a power-off detection circuit and a power supply, the power-off detection circuit is connected with the video intercom indoor unit through a power-off separation circuit, and the video intercom indoor unit is further connected with a network cycle inspection circuit. The elevator control system comprises an elevator controller, wherein the elevator controller is connected with elevator keys through a photoelectric isolation circuit. The hub and the video intercom indoor unit are connected through a TCP/IP network, and the elevator controller and the video intercom indoor unit are connected through a CAN bus. Due to the facts that elevator control and video intercom operation are integrated, and video monitoring signals and elevator running information are shared, the elevator waiting environment of a user is improved.