The invention relates to an end product for air-conditioning indoor unit, which comprises a heat exchange tube through which air and refrigerant exchange heat; a heat exchange fin on which a tube hole for passing through the heat exchange tube is formed and the surface of which is coated with a hydrophilic coating containing photocatalytic material; and an ultraviolet lamp arranged at or near the heat exchange fin, so that the ultraviolet light of the ultraviolet lamp can cover the surface of the heat exchange fin coated with the hydrophilic coating. The invention further provides an air-conditioning indoor unit configured with the end product and a method for coating heat exchange fins of the end product. The end product for air-conditioning indoor unit according to the invention can achieve highly efficient air purification.