The invention discloses a rapid fire-fighting spraying system and method. The rapid fire-fighting spraying system comprises a liquid storage tank, a booster pump, a spraying head, a pressure stabilizing meter, an electromagnetic valve, a flame detector and a controller, wherein the booster pump communicates with the liquid storage tank, the spraying head communicates with the water outlet end of the booster pump, the pressure stabilizing meter is connected onto a pipeline between the spraying head and the booster pump, the electromagnetic valve is connected with the spraying head, the flame detector is used for detecting the fire of equipment, and the control box is electrically connected with the flame detector, the booster pump, the electromagnetic valve and the pressure stabilizing meter; and a fire extinguishing liquid with a preset pressure is arranged in a pipeline between the electromagnetic valve and the pressure stabilizing meter, so that the pressure in the pipeline is withinan expected range; when the pressure in the pipeline is smaller than the set lower threshold value of the pressure stabilizing table, the booster pump is started to pump the fire extinguishing liquidinto the pipeline; and when the pipeline pressure reaches the upper threshold value set by the pressure stabilizing meter, the booster pump is closed. By arranging the pressure stabilizing pipeline,the system can quickly extinguish the fire on production equipment, the time when a fire extinguishing agent is sprayed from the detected fire to the spraying system is not more than 250 ms, the fireextinguishing speed is high, and the spraying direction of the spraying head is easily adjusted.