PURPOSE: To widely reduce an artificial miss by transferring a module from a control computer, automatically executing the release of the module and automatically and synchronously starting work in respective distributed computers.

CONSTITUTION: The module including a program to be used or data is transferred from a control computer 1 to plural distributed computers 2-i and the release of the module is automatically executed. Then, the work related to the module, to which the release is executed, is automatically and synchronously started in the respective distributed computers 2-i. Thus, the various artificial miss is widely reduced in the release of the module and the necessity of an operator exclusive for the release of the module is eliminated in the distributed computer side.