An image forming apparatus and a method thereof are disclosed. The image forming apparatus comprises: a first interface unit, which includes a first port and a second port, respectively used for establishing a first channel and a second channel between the image forming apparatus and a driving device of the image forming apparatus; an imaging controller, used for receiving data from the first channel as page data to be imaged, and acquiring data from the second channel as virtual data; and a timer, used for calculating a first duration from a last time when the image forming apparatus receives either page data from the first channel or virtual data from the second channel, whichever comes later, wherein when the first duration reaches a first predetermined duration, the imaging controller performs timeout handling for ceasing a present imaging job. The image forming apparatus can save resources and improve user friendliness.