The invention discloses an air source heat pump set capable of realizing working medium direct supply radiant cooling and heating and supplying fresh air. The air source heat pump set comprises a shell, a surface air cooler I, a partition plate and a surface air cooler II, wherein a space in the shell is partitioned into an air introduction cavity, an air supply cavity and an air return cavity in sequence from front to back; a compressor I is connected with a four-way valve I; the four-way valve I is connected with the surface air cooler I and the surface air cooler II; the surface air cooler I is connected with the surface air cooler II through a connection pipe with a capillary; a micro air introduction opening is formed in the shell; the compressor II is connected with the four-way valve II; the four-way valve II is connected with the surface air cooler II and a direct expansion type heat exchange system respectively; and the direct expansion type heat exchange system is connected with the surface air cooler II through a connection pipe with a capillary. According to the air source heat pump set, a floor is heated or cooled through a working medium direct supply floor (wall plate and floor) heat exchange system; a filtration and compression system is used for filtering, dehumidifying, cooling and heating fresh air and indoor circulating air to realize cooling, heating and fresh air supply to an indoor system.