This paper introduces the necessary of condition monitoring system for power transmission and transformation equipments.It is plays an important role on safe operation of power equipment.At the same time starting from system design

first the need for the power transmission and transformation equipment status monitoring system are described

and system design principles are elaborated in detail

based on this hierarchical design.The structure as a whole is divided into three levels

master layer

the monitoring layer

sensing layer.Highlighted the main points of the functional layer and monitoring the level design.Then the flow of the entire system to estimate the viability of the existing communications network is analyzed.Finally

the monitoring system based on IEC 61850 modeling and model of coordination has been discussed

and the system running safe and effective measures to improve overall system performance of the smart grid building has been summarized.Results show that power transmission and transformation equipments monitoring system is very important.