Light receiving device and photovoltaic system

The invention relates to a light receiving device and a photovoltaic system, the light receiving device is applied to the photovoltaic system, and the photovoltaic system comprises a photovoltaic cell assembly; the light receiving device comprises a support and a light receiving plate. The support is connected to a roof or a frame of the photovoltaic cell assembly. The light receiving plate covers the photovoltaic cell assembly and is rotatably connected with one end, away from the photovoltaic cell assembly, of the support, the light receiving plate comprises an incident surface and a light emitting surface which are oppositely arranged, the light emitting surface faces the photovoltaic assembly, and the light emitting surface is constructed to be formed by sequentially splicing a plurality of concave surfaces end to end in the first direction; wherein the light enters the light receiving plate from the incident surface, is refracted, is diverged by the concave surfaces and then irradiates the photovoltaic m