Camillo Rapetti attended the School of Decorative and Figural Art at the Brera Academy in Milan where he made his debut by winning the Fumagalli Prize with a portrait commissioned by Vittore Grubicy. He travelled to Rome, Paris and London developing the techniques of oil painting, watercolour and engraving. He received important commissions for decorative work in Milan where he frescoed civic buildings like the Teatro Eden and religious edifices like the church of the Ospedale Maggiore, he also executed some portraits of benefactors for the same institution. He showed genre scenes at the Turin Quadriennale in 1902 and at the Mostra Nazionale di Belle Arti di Milano in 1906. In 1926 he particpated in the first exhibition of Milanese artists organized by the Famiglia Meneghina.