Fire flame detection method and system

The invention relates to a fire flame detection method and system wherein the method comprises: using a photographing and monitoring device to photograph a video stream image of a fire monitoring area; extracting a motion history image from each frame of the video stream image; performing flame-like color pixel extraction on the video stream image to obtain a flame-like color image; performing AND operation on the motion history image and the flame-like color image and screening and selecting the flame region candidate blocks; screening the flame region candidate blocks of plural successive frames from the video stream image and obtaining the number of flame beats and the edge beating amplitude values of the flame region candidate blocks of the frame video image; according to the number of flame beats and the edge beating amplitude values, calculating and obtaining the probability to determine the flame region candidate blocks as a flame region; and when the probability exceeds a preset value, determining tha