The disclosure relates to a robot cleaner. The robot cleaner comprises a main body; a plurality of spin mop assemblies disposed at a lower portion of the main body and configured to include at least one mop pad attached at lower portions of the plurality of spin mop assemblies; a driving assembly configured to drive the plurality of spin mop assemblies; a first supply assembly configured to store a first liquid inside the main body and supply the first liquid to at least one mop pad of some of the plurality of spin mop assemblies by adjusting a first valve; and a second supply assembly configured to store a second liquid inside the main body and supply the second liquid to at least one mop pad of the others of the plurality of spin mop assemblies by adjusting a second valve.