Abstract: Described herein is a fire-extinguishing method of a pool fire utilizing water mists, wherein the water mists are discharged so as to surround the flame base portion of a pool fire virtually without a gap, directed not to the burning surface and the flame base portion directly, but to any of positions of the flame center axis from a plurality of positions on the side of the burning surface, while water mists are being discharged toward the flame center axis above the flame base portion from a plurality of positions above the burning surface, so that the fire is extinguished.