Electric system key equipment actualizing-one-prepared method and system based on network

The invention discloses an electric system key equipment actualizing-one-prepared method and system based on a network. The electric system key equipment actualizing-one-prepared system comprises a plurality of nodes, one of the multiple nodes is the main node, other nodes are the child nodes, the nodes are in communication through the network, and the states of the nodes include the main state, the voting state and the auxiliary state. The main node maintains the global state of a bus and manages the child nodes through a node state list and a node priority list. According to the electric system key equipment actualizing-one-prepared method and system, the main node is dynamically generated through voting, when the child nodes find that the main node loses efficacy, a voting mechanism will be trigged, and therefore the new main node is generated. By means of the voting mechanism of the electric system key equipment actualizing-one-prepared method and system, it can be guaranteed that the scheme is accurate and reliable.