The invention discloses an ultraviolet electric light source and an indoor cleaning system and method. The electric light source comprises a double-layer glass tube, ozone generating coils (51) and hydroxyl radical generating coils (61). A lumen (44) between the inner glass tube and the outer glass tube (43) in the double-layer glass tube is filled with an inert gas. The end part of each lumen (44) is closed. The ozone generating coils (51) and the hydroxyl radical generating coils (61) form double helix tubes. The double helix tubes are located in the lumens (44) and are coiled on the outer wall of the inner glass tube. Externally input air and water are used to generate an ozone gas and primary purified water. According to the scheme of the invention, the defects of high cost, low efficiency, secondary pollution and the like in the prior art can be overcome, and the ultraviolet electric light source and the indoor cleaning system and method have the advantages of low cost, high efficiency and environmental protection.