The invention relates to a building intelligent security monitoring device, which includes a wall, a monitoring mechanism, a smoke sensor and a loudspeaker, a camera is arranged inside the monitoring mechanism, a shell is arranged between the monitoring mechanism and the wall, and the smoke sensor It is connected with the loudspeaker on the two side walls of the casing respectively, and the casing is provided with a smoke dredging chamber, a water delivery chamber and a water-proof chamber, and several smoke inlet holes are arranged on the side wall of the smoke dredging chamber , the lower end surface of the shell is provided with several spray holes, the water delivery chamber communicates with the spray holes, and the water-proof chamber is provided with a rotating mechanism. This building intelligent security monitoring device not only monitors the screen through the camera, but also monitors the fire inside the building. The camera will not be damaged quickly, and the situation in the building can be understood to a certain extent through the camera, which has high security.