A computer automatic assembly system is proposed. The computer automatic assembly system includes: a database for storing information of an assembly and mounting area of a part combined to a mainboard, and program information such as information of a BIOS, a driving driver, and an operating system, and periodically updating the corresponding information through a communication part including a wired/wireless communication network; a device digestive module for checking the part through a photographing means, moving the checked part to the assembly and mounting area of the part provided on the mainboard through the photographing means and a robot arm for transfer, assembling, and mounting the part, and then writing a driving program and circuit information of the part; and an administrator terminal for periodically upgrading or updating part information necessary for the device digestive module by a part company server through a communication network including the wired/wireless communication network.

Provided is a program storage device and a program storage system for transferring an appropriate program in advance to a numerical controller. A program storage device that transfers a program or page to a numerical controller includes: a statistical information collection unit that records at least a total number of times of transfer of the program or page transferred to the numerical controller; a prediction unit that predicts the program or page to be transferred subsequently, based on an execution state of the program in the numerical controller and the total number of times of transfer; and a program transfer control unit that transfers the predicted program or page.