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With the more large space of public buildings, the traditional spray water can not meet the needs of the fire. The fire safety of these places also becomes increasingly prominent. For existing automatic fire extinguishing devices use infrared sensors as sensing elements. However, they are vulnerable airstream, resulting in reduced fire accuracy. Infrared video was used as sensing elements in this paper. A video intelligent fire water cannon based on dual-core was designed and developed. The working principle was mainly introduced, and the hardware circuit structure and software are designed. Then a jet segment compensation method was proposed. The experimental results show that the developed water cannon identifying the fire by video tracking and jet segment compensation method improves the accuracy of the positioning. The water cannon based on dual-core working ensure timeliness for detecting fire. The designed water cannon meet design requirement for large space and national standard. It provides a new fire fighting equipment options for large space and field fire.