To provide a cleaning method with steam at site, by which the article to be cleaned can be sterilized and cleaned satisfactorily at the place where the article to be cleaned exists.

This cleaning method with steam at site comprises a step to carry out sucking/removing work by abutting a sucking port 1a of a sucking machine 1 on a curtain 20, a step to carry out steam-cleaning work by emitting steam of a steam generator 2 toward the curtain 20, a step to carry out the sucking/removing work again, and a step to carry out drying/sterilizing work by emitting infrared rays from an infrared irradiating apparatus 3 toward the curtain 20.