An information processing apparatus comprises acquiring means for acquiring a memory capacity of a printer connected through a bi-directional interface, compare means for comparing the memory capacity acquired by the acquiring means with a capacity of data to be outputted to the printer, and determination means for determining a memory size of a memory of the printer in accordance with the comparison result. An output apparatus comprises receiving means for receiving memory size information determined by a capacity of data to be outputted from an information processing apparatus connected through a bi-directional interface and a capacity of a memory for storing the data, from the information processing apparatus, and setting means for dynamically setting a size of the memory for storing the data in accordance with the memory size information received by the receiving means.