Stair-structured　Cu2-xHoxO　is　synthesized　by　gas-liquid　phase　chemical　deposition　and　a　subsequent　heat　treatment　method.　The　UV-visible　spectrum　of　the　stair-structured　Cu2O　and　Cu2-xHoxO　exhibits　strong　absorption　peaks　in　the　UV　region,　and　the　Ho　atom　doping　reduces　the　band　gap　of　Cu2O.　Photoluminescence　spectroscopy　demonstrates　that　the　luminescence　intensity　of　the　stair-structured　Cu2-xHoxO　first　increases　with　Ho　addition　and　then　decreases　as　the　Ho3+　concentration　increases　further.　The　fluorescence　lifetime　curves　show　that　the　fluorescence　lifetime　of　the　stair-structured　Cu2O　samples　is　shortened　by　Ho3+　ion　doping.　Stair-structured　Cu2-xHoxO　exhibits　distinct　and　stronger　room-temperature　ferromagnetism,　and　its　saturation　magnetization　value　shows　a　parabolic　trend　with　the　increase　of　Ho3+　ion　doping　concentration.　The　first-principles　calculation　results　show　that　the　magnetic　properties　of　the　staircase-structured　Cu2O　are　mainly　due　to　the　splitting　of　spin-up　and　spin-down　electrons　near　the　Fermi　energy.　The　density　of　states　shows　that　the　Ho　atom　doping　contributes　to　the　magnetism　of　the　stair-structured　Cu2-xHoxO　sample,　and　the　values　of　Ms　of　the　samples　can　be　regulated　by　the　Ho　atom　doping　concentration.　The　magnetic　properties　reflect　a　strong　d-d　exchange　interaction　between　the　Ho　ions.　©　2024　American　Chemical　Society.