In　order　to　solve　the　problem　that　the　traditional　heat　pump　system　in　the　cold　area　of　North　China　cannot　supply　heat　efficiently　and　stably,　a　novel　solar-air　source　heat　pump　system　is　proposed　to　meet　the　needs　of　building　energy　consumption.　In　winter,　the　latent　heat　of　water　in　the　ice　tank　is　used　as　the　main　low-temperature　heat　source　for　the　heat　pump,　and　the　outdoor　air　is　used　as　the　auxiliary　heat　source.　During　the　day,　the　solar　energy　is　used　to　restore　the　heat　of　the　ice　tank,　so　as　to　realize　the　complementary　utilization　of　renewable　energy.　The　air　source　heat　pump　can　be　used　for　cooling　in　summer.　In　addition,　combined　with　night　energy　storage　(cold　storage　and　heat　storage),　the　＇peak　load　shifting＇　and　the　minimization　of　building　operation　energy　consumption　and　cost　are　realized.　The　experimental　platform　and　simulation　model　of　the　system　are　established,　and　the　operation　and　design　scheme　of　the　system　are　optimized　with　the　optimal　economy.　The　optimization　results　show　that　the　system　can　still　maintain　efficient　operation　under　continuous　extreme　weather　in　winter　and　summer,　and　the　SPF　of　the　system　in　winter　and　summer　are　2.93　and　2.6,　respectively.　Solar　photovoltaic　power　generation　meets　part　of　the　power　demand　of　the　system,　which　can　save　about　1.85　t　of　standard　coal　compared　with　thermal　power　generation.　Compared　with　a　conventional　air　source　heat　pump　system,　the　novel　system　has　better　economy　and　a　dynamic　investment　payback　period　of　3.86　years.　The　proposed　system　presents　a　way　to　meet　building　energy　supply　that　is　worthy　of　popularization　and　application　in　cold　areas.　©　2022　Elsevier　Ltd