The invention relates to a multidirectional early-warning positioning and automatic tracking and monitoring device for a monitoring area, which still can monitor a panorama area with a large range even under the condition of low illumination. The monitoring device comprises an early-warning positioning mechanism and a tracking warning mechanism, wherein an early-warning positioning module is arranged inside the early-warning positioning mechanism, and a tracking warning module is arranged inside the tracking warning mechanism. According to the monitoring device, a plurality of directions are subjected to early-warning video collection so as to directly detect the trends of the inside of a plurality of early-warning video images to determine the position information of a monitored moving object, and therefore, the moving object is subjected to tracking video collection, voice frequency collection, illumination warning and sound warning. Meanwhile, an alarm signal is added in a corresponding video image, master control equipment is controlled by passing an instruction back to generate an alarm action, and finally, a plurality of early-warning videos and tracking videos are stored and transmitted to display equipment. The monitoring device has a multidirectional monitoring area regulation function, and the applicability and the flexibility of the monitoring device are obviously improved.