Constructed on the basis of TCP/IP network architecture， the prevailing electricity information network has such drawbacks as functional redundancy， hard-to-expand fixed layers and low transmission efficiency. In view of the problems with the existing electricity information network architecture， a new electricity information network architecture， called service electricity information network， is proposed. The node model， system model and protocol design of the service electricity information network are presented. Free from the restraint by the layered network architecture， the new architecture is capable of providing a simple， highly efficient， and well expandable method for dealing with current network problems.