A condition monitoring system for distribution network switchgear and controlgear assemblies is established in order to support the asset management of distribution network. The system is composed of the sensors, condition monitoring intelligent electronic device (IED) and the diagnostic platform. The monitoring items include mechanical characteristics parameters, thermal characteristics parameters and insulation condition parameters of switchgear and controlgear assemblies. The second version of IEC 61850 communication protocol is applied to build each condition monitoring logical node model. The monitoring system could also be seamlessly integrated with power automation system of distribution network, and interact with distribution terminal unit (DTU) and power automation system. Maintenance suggestions from the monitoring system would help power utility asset managers to make right maintenance decisions. Switchgear condition information could also be useful for improving the feed line automation and self-healing control functionalities of distribution network.