The present invention discloses an image forming system and apparatus and the method for control and troubleshooting. Wherein the image forming apparatus comprises a communication interface unit for communicating with external equipment; a storage unit for storing page data information, wherein said page data information includes page data for image-forming processing; a page order determining unit to determine the image-forming processing order of said page data, i.e., image paging order; an image-forming unit that performs the image-forming processing; and an image sending unit that sends said page data stored in said storage unit to said image-forming unit according to the image paging order determined by said page order determining unit. The present invention is capable of saving the memory resources of the host connected with the image forming apparatus, reducing the purchase cost of the host and achieving a more energy saving and environmentally friendly printing process.