The invention provides an information interaction bus system. The system comprises an outage management subsystem, a geographic information subsystem, a marketing management information subsystem and/or a PI (proportional integral) database subsystem and an automatic distribution management subsystem, wherein the outage management subsystem, the geographic information subsystem and the marketing management information subsystem and/or the PI database subsystem are positioned in a third safety area, the automatic distribution management subsystem is positioned in a first safety area, the subsystems positioned in the third safety area and the first safety area are connected with a same information interaction bus through respective interface servers, and the interface servers are used for converting data which are sent from the subsystems to the information interaction bus into CIM (common information model) data or converting the CIM data received from the information interaction bus into data compatible with the subsystems. The embodiment of the invention further provides an electric power data transmission method based on the information interaction bus system. By the aid of the information interaction bus system and the electric power data transmission method in the embodiment, the problem of information isolated islands can be solved, and overall efficiency of an electric power system is improved beneficially.