Abstract: A vehicle charging and discharging system to be applied to an electric vehicle includes a rectifier, an inverter, a relay, and a control processor. The rectifier is disposed on a charging path through which a battery of the electric vehicle is to be contactlessly charged from external equipment via a coil in the electric vehicle. The inverter is disposed on a first path from the battery to an electric power output terminal of the electric vehicle, the electric power output terminal allowing for output of electric power stored in the battery. The relay is disposed on a second path from the inverter to the coil. The control processor controls an operation state of the relay to allow the electric power stored in the battery to be contactlessly discharged to the external equipment via the inverter, the relay, and the coil on the second path.