The international electrical commission(IEC)energy management system application program interface(EMS-API)is a standard to encourage the integration between power enterprise applications. Since the component interface specification(CIS)of EMS-API standard has been upgraded to object linking and embedding for process control(OPC)unified architecture(UA)technology

this paper studies the problem to manage the common information model(CIM)data by using the OPC UA address space model. The mapping rules from the CIM data to the OPC UA address space model

the rules of mapping the identifier and name of the UA node to CIM instances

and the process method of relationship in CIM data

are proposed. Subsequently

based on the UA Stack library developed by the OPC foundation

the CIM data OPC UA server is realized and verified in practice.