Embodiments of the disclosed technology are directed to a rapid charging power supply system capable of rapidly charging an electric moving body, such as a vehicle. Certain example embodiments are directed to a rapid charging power supply system capable of rapidly charging two electric moving bodies with different charging methods at the same time using a single system. For example, a rapid charging power supply system capable of rapid charging, using a single system, both an electric moving body having a rapid-charging control means equipped therein and an electric moving body that does not have a rapid-charging control means equipped therein is provided.