Abstract: The present invention relates to a full-auto scan control method and without central processing unit (CPU) of computer operation. There are two groups of register pre-reserved inside the system according to the original design. The control parameter can be installed before scan is operation. The system is able to read responded parameter when it inquires. Therefore there is no requirement of the CPU of computer control it when it is under scanning situation. The scan operation is controlled by pre-reserved control parameter data, which is installed into scanner via applied specific integrated circuit (ASIC) of scanner. And also it is recycled into the end of scan process. The best feature is no wasting time and without using computer according to the present invention.