Fire source detection method, system and device

The invention discloses a fire source detection method, system and device, which are used for determining a high-temperature target according to a thermal imaging image and judging whether the high-temperature target is a fire source in combination with a target detection result of a visible light image, so that the false alarm rate is reduced, and the fire source detection accuracy is improved. The fire source detection method provided by the invention comprises the following steps: acquiring a thermal imaging image and a visible light image which are simultaneously acquired for a target area with a reflective surface; extracting a high-temperature target of which the temperature is higher than a preset temperature threshold value from the thermal imaging image to obtain at least one high-temperature target image; and inputting the visible light image into a pre-trained target detection model to obtain at least one reflected light target image, wherein the reflected light target refers to a non-fire-source h