The　application　of　zero-emission　passive　radiative　coolers　is　a　crucial　step　toward　global　carbon　neutrality.　However,　a　single　radiative　cooling　function　cannot　meet　the　thermal　requirements　under　various　weather　conditions.　We　present　a　dual-mode　thermal　management　film　that　integrates　passive　radiative　cooling　and　heating　functions　through　its　porous　polymer　surface　for　cooling　and　a　light-to-heat　conversion　surface　enabled　by　graphene　and　carbon　nanotubes　for　heating.　The　surfaces　of　the　dual-mode　film　were　physically　flipped,　positioning　the　corresponding　surface　toward　solar　radiation　to　obtain　the　desired　functionality.　In　the　cooling　surface,　the　film　achieves　sub-ambient　cooling　of　approximate　to　13.3　degrees　C　under　853.88　W　m-2　of　sunlight,　thanks　to　its　high　solar　reflectance　(0.92)　and　mid-infrared　emissivity　(0.95).　In　the　heating　surface,　it　uses　high　solar　absorption　(0.90)　to　increase　the　temperature　by　11.4　degrees　C　and　generates　Joule　heating　at　various　voltage　levels.　According　to　EnergyPlus　software　estimates,　buildings　with　roofs　covered　in　the　film　could　reduce　CO2　emissions　by　1.109　billion　metric　tons,　equivalent　to　3%　of　current　global　CO2　emissions.　This　study　offers　a　promising　solution　to　climate　challenges　and　holds　great　potential　for　energy　savings　and　carbon　reduction.