As the traditional centralized network modeling for energy management system（EMS）in control center is error prone，heavily reliant on maintenance，and lacking in self-healing ability while unable to satisfy the needs of the distributed application of future transmission grid，a method of substation-control center two-level distributed network modeling is presented.The information model including the network model as well as one-line diagram is built in the substation，transferred to the control center after transformation，and then merged to form an entire network model in control center.The architecture and key technologies such as substation modeling，model transferring and transforming，model joining are discussed in detail.The proposed method has been successfully implemented in China Eastern Grid as shown in the field-application results.