The invention discloses a multifunctional metal cabinet, and the cabinet comprises a rectangular bearing substrate. The upper surface of the rectangular bearing substrate is fixedly connected with a bar-shaped vertical box body, and the lower surface of the rectangular bearing substrate is provided with an automatic lifting mechanism. The interior of the bar-shaped vertical box body is provided with an equipment bearing mechanism, and the front surface of the bar-shaped vertical box body is provided with a detection mechanism. The edge of the lower end of the front surface of the bar-shaped vertical box body is provided with a network line supporting mechanism, and the center of the upper surface of the bar-shaped vertical box body is fixedly connected with a circular substrate. The upper surface of the circular substrate is provided with a zigzag-shaped support in an embedded manner, and the zigzag-shaped support is provided with a miniature camera in a sleeved manner. The beneficial effects of the invention are that the cabinet is convenient for operation, can record the surrounding air condition in real time, can carry out the transmission timely, facilitates the control, facilitates the arrangement of network lines, and facilitates the water prevention.