Aiming at the often occurred “buried alive” accidents in the coal industry, bulk cargo docks etc., a alarm system was designed by using structure of IRCCD+CPLD+DSP. Real-time capturing, processing and displaying of infrared image were implemented to recognize the life target in tipper consequently. In the image capture module in which CPLD is the controlling core, SAA7111A video processing chip was used to implement changing analogue image to digital image and synchronously controlling time-sequence. In the image processing module in which fix DSP TMS320C6416 is the core, infrared image was enhanced and the image feature was extracted, and life target recognizing in tipper was realized. Sound-light alarm delay circuit in which 555 is the core is used to implement alarming. In the ending of the paper, the result of feature extraction at the different interior thresholds was given. Experiment results demonstrate that the ideal result can be achieved at the 0.8 interior thresholds of gray level.