A fire scene evacuation guiding device includes an indicator (100) and a thermoelectric converter (200). The thermoelectric converter (200) is electrically connected with the indicator (100), the thermoelectric converter (200) includes a first detecting end (210) and a second detecting end (220), and the first detecting end (210) and the second detecting end (220) are arranged away from each other. The thermoelectric converter (200) can provide evacuation instructions according to a real time situation at a fire scene.