Disclosed herein is a processing system, including: a GPU generating a video; a memory storing data; a data bus connecting the GPU and the memory to each other; a DMA controller connected to the data bus; an input/output bridge connected to the data bus and connected to an external bus for transferring data to and from an external processing system which cooperates with the processing system; and a CPU cooperating with the GPU to share the data stored in the memory. The GPU issues a data transfer instruction of the data stored in the memory to the DMA controller without intervention of the CPU. The DMA controller controls, when the data transfer instruction is received, the input/output bridge to transfer the data stored in the memory to the external processing system.