The S600-ExIR2-UV point type infrared/ultraviolet flame detector includes two infrared wavelength sensors, a high-sensitivity imported UV sensor, and an optical filter. The ultraviolet sensor can react to ultraviolet radiation at the moment of fire and explosion ignition. The other two infrared sensors, one has the highest sensitivity to CO2 emission spectrum (4.4 μ m), and the other detects interference from environmental light and thermal radiation. The detector combines the ultraviolet and infrared signals generated during a fire and combines them with the logical synthesis of flame flicker frequency for multi signal processing, maximizing the suppression of false alarms and the required optimal fire detection performance. Flame detectors have early warning performance for fires caused by organic materials such as hydrocarbons and inorganic fires.