System and method for foaming

This invention concerns a foaming system and foaming method having a simple and cheap structure capable of supplying foamed surface active agent solution to a relatively wide supply object uniformly with an excellent foaming condition. This foaming system (floor surface cleaning system 1) comprises: a plurality of foaming means (foaming devices 2a-2d) for foaming surface active agent solution; foamed liquid supply means for supplying the surface active agent solution foamed by the plurality of foaming means to a supply object (floor surface F); a surface active agent supply means (liquid supply pipe 13) for supplying the surface active agent solution to the plurality of foaming means; a gas supply means (air supply pipe 26) for supplying gas to the plurality of foaming means; and a water supply means (liquid supply pipe 13) for supplying water to said supply object. The foamed liquid supply means includes a plurality of pipe-like members (division pipes 6a-6d) corresponding to the plurality of foaming means.