Abstract: There is described a garbage disposal apparatus including a storage drum for storing garbage and having a meshed bottom, and an agitation and mixing mechanism disposed within the storage drum, the agitation and mixing mechanism stirring and mixing together garbage and microorganism-carrying carriers, and the garbage being fermented and decomposed, wherein a water-spraying mechanism is disposed beneath the meshed bottom of the storage drum and squirts water to the meshed bottom from outside of the storage drum.