Provided are an image forming apparatus, a host apparatus, and a method of performing an image forming job. The image forming apparatus includes a memory, an interface to receive image data to perform an image forming job, and a controller to, when the image data is input in a power save mode of the image forming apparatus, send the image data to other image forming apparatus, and when the image forming apparatus switches to a normal mode, control the image forming apparatus to perform an image forming job using the image data sent to the other image forming apparatus.