Space photovoltaic power generation system

A space photovoltaic power generation system comprises a plurality of power satellites (1) arranged in space, each of which converts electric energy, into which sunlight has been photoelectrically converted, into a microwave, and transmits the microwave to an electric power base (2). The system can thus transmit a microwave of high power to the electric power base (2). Each of the plurality of power satellites (1) modulates the generated microwave so as to generate an incoherent microwave before transmitting it to the electric power base (2), thus reducing the power density of the electric power transmitted to the electric power base (2) on the earth and hence a loss in the total amount of energy transmitted to the electric power base (2) on the earth.