The invention discloses a base and a bladeless fan. The base is used for the bladeless fan. The base comprises a housing, a power system arranged in the housing and a silencing structure, wherein the housing comprises a bottom plate and an outer wall, the outer wall is fixed on the bottom plate, and an air inlet is formed in the outer wall; the power system is used for sucking air through an air inlet to establish an air flow; and the silencing structure comprises a silencing base arranged on the bottom plate, and a cover plate covering the silencing groove; the silencing groove is formed in the silencing base, the silencing groove is spiral, and the silencing groove spirally extends toward the outer wall from the center of the silencing base; a sound guiding hole communicating with the silencing groove is formed in the cover plate, and the sound guiding hole faces the power system. In the base and the bladeless fan according to the embodiment of the invention, a sound generated by the power system can enter the silencing groove through the sound guiding hole, and the sound is consumed in a propagating process in the spiral silencing groove, so that the sound propagated out of the housing is reduced, and therefore, a noise-reducing effect is achieved; moreover, air can normally enter the housing so as to guarantee normal work of the bladeless fan.