An automatically-organized discrete functional computer group system, method and use of the present invention relates to a computer group having a specific function. The functional computers refer to an intelligent controller and an end controller each having a unique code, a storage space and its own CPU. The intelligent controller comprises a network control module, and the network control module comprises a self-organization module. An identification address generator module in the self-organization module acquires, according to a relevant mechanism, the authority to make decisions, and configures, under the authority thereof to make decisions, an identification address of a powered device connected to another intelligent controller and end controller. As such, components in functional computers have the capability of self-organization and self-management, without the need for address setting and allocation of internal network facilities by a network administrator after a network connection. The present invention resolves obstacles to networking of devices other than computers in the prior art, and realizes, through self-organization, use of network low-voltage circuit connection in various powered devices.