Energy　and　environmental　crises　have　become　critical　challenges,　making　the　efficient　use　of　clean　energy　a　focus　of　public　attention.　Although　emerging　clean　energies　have　high　economic　and　environmental　values,　these　single　energy　sources　are　not　well-developed.　In　colder　climates,　maintaining　a　stable　fermentation　temperature　can　be　difficult,　leading　to　the　idling　of　many　biogas　digesters.　Furthermore,　despite　extensive　research　on　solar-assisted　air-source　heat　pumps,　these　systems　perform　poorly　in　cold　climates　with　low　solar　irradiance.　To　address　these　issues,　this　study　investigates　the　integration　of　a　solar-assisted　biogas　and　air-source　heat　pump　hybrid　heating　system　(SBHP-HHS)　for　capillary　radiant　heating　in　rural　North　China,　specifically　adapted　to　local　conditions.　The　system　aims　to　utilize　the　combined　benefits　of　various　clean　energy　sources　to　improve　system　reliability　in　harsh　climates.　By　combining　experimental　analysis　with　TRNSYS　simulation,　the　system　performance　during　the　heating　season　in　rural　northern　China　was　evaluated.　Experimental　results　show　that　the　hybrid　system,　utilizing　the　radiant　capillary　terminal,　is　capable　of　maintaining　room　temperatures　above　20　degrees　C,　demonstrating　its　effectiveness.　Simulation　results　show　that　the　air-source　heat　pump　achieves　a　coefficient　of　performance　(COP)　of　4.6.　This　efficiency　level　is　generally　favorable,　ensuring　stable　operation.　Additionally,　the　system　achieves　a　solar-biogas　hybrid　utilization　rate　exceeding　75　%　and　a　primary　energy-saving　rate　of　78　%.　Economically,　the　system　offers　an　8.23-year　dynamic　payback　period　and　annual　cost　savings　of　3055　CNY.　Environmentally,　it　reduces　CO2　emissions　by　4263.6　kg　annually.　This　study　provides　a　solid　experimental　foundation　for　further　research,　offering　empirical　evidence　to　optimize　system　performance.