Patent ID: 8391741

Claim:
An image forming system comprising: an Image Forming Operation Unit that executes an image forming operation; an Air Cleaning Operation Unit that executes an air cleaning operation, wherein the Air Cleaning Operation Unit is provided with an ion generating function; a power source that supplies power to the Image Forming Operation Unit and the Air Cleaning Operation Unit; and a Control Unit that has a coordinated OFF control function of coordinating a first power supply OFF control for turning off power supply from the power source to the Image Forming Operation Unit and a second power supply OFF control for turning off power supply from the power source to the Air Cleaning Operation Unit, wherein the coordinated OFF control function is configured to execute the second power supply OFF control when a preset time period elapses after executing the first power supply OFF control, wherein the image forming system is provided with a normal mode and a power saving mode in which power consumption is less than in the normal mode, and an ion emission direction of an ion emitted by the Air Cleaning Operation Unit differs between the normal mode and the power saving mode.