Border defense is something that cannot tolerate mistakes. Since infrared thermal imager is a device that reflects the temperature of the surface of an object while imaging, personnel patrolling with infrared thermal imager can avoid situations that result in missed, mistaken and unnoticed checks. In addition, in the field of security, infrared thermal imaging equipment can also be used as an effective fire alarm equipment. We know that in large areas of the forest, hidden fires are often drones are unable to accurately determine, thermal imagers can quickly and effectively find these hidden fires, and accurately determine the location and extent of the fire, through the smoke to find the fire point, to prevent early, early extinguishment.