The invention discloses a solar energy electric heating mixing unit and a system, and belongs to the technical field of solar energy application. The solar energy electric heating unit comprises a photoelectricity heat collection pipe and a light receiving surface, wherein the photoelectricity heat collection pipe is positioned on a focus of the light receiving surface and comprises a photovoltaic cell and a heat conduction pipe; the external surface of the heat conduction pipe is covered with the photovoltaic cell; an output end of the photovoltaic cell is connected with an inverter; a heat-conducting medium is mounted in the heat conduction pipe; the system comprises one or more solar energy electric heating units; the photoelectricity heat collection pipe adopts such structure that the heat conduction pipe of the heat-conducting medium is covered with photovoltaic cell, so that the light-gathering generating electricity and light-gathering heating can be realized simultaneously, Therefore, the utilization rate of the solar energy resource is improved. Besides, the focus of the light receiving surface is aligned with the photoelectricity heat collection pipe, the sunlight shooting at right angles to the light receiving surface can be gathered on the photoelectricity heat collection pipe, the light-gathering efficiency of the solar energy electric heating mixing unit and the system is improved, the utilization rate of the solar energy resource is further improved.