The present invention relates to a wetting extinguishing agent composition, comprising a metal carbonate; urea; a freezing point lowering agent; a fluorine-based surfactant; an amphoteric surfactant; and water, wherein the wetting extinguishing agent composition has excellent extinguishing ability not only for Class A fires, which are general fires, and Class B fires, which are oil-based fires, but also for Class K fires, which are kitchen fires.