An image forming system includes: a print controller which generates image data based on a print job; and an image forming apparatus which controls the print controller and performs a printing operation based on the image data, wherein the image forming apparatus includes: a first interface section which connects with a first line for receiving the image data from the print controller; a second interface which connects with a second line with which a client can connect, the second line for communicating with the print controller; and a control section which executes a first control which, through the first line, executes an initial setting which enables the print controller to be used through the second line, and a second control which executes of the print controller after the initial setting is executed through the second line.