The invention provides an intelligent sensing device. The intelligent sensing device comprises suction cups, check blocks, crash bars, rod grooves and thermal rectifying elements. The check blocks areinstalled on the two sides in a box body. The rod grooves are formed in the left side and the right side of the front end of the upper part of the box body. The crash bars are inserted into the rod grooves. The thermal rectifying elements are arranged on the check blocks. Each thermal rectifying element comprises a silicon substrate, a porous silicon layer, a clamping groove and an aluminum film,wherein the aluminum film is arranged on the lower part of the silicon substrate, the porous silicon layer is arranged on the upper part of the silicon substrate, and the clamping groove is formed inthe left side of the silicon substrate. According to the intelligent sensing device, by means of paired arrangement of the check blocks, the four thermal rectifying elements can be arranged on the check blocks at the same time; by means of the crash bars, the thermal rectifying elements are advantageously prevented from sliding out of the box body; and by means of the suction cups, the stabilityafter installation is advantageously improved, and the crash bars are prevented from being completely drawn out of the rod grooves.