Aiming at the shortage of detection range of substation metering device in the prior art，a new detection system scheme is proposed. The design divides the overall system solution into the underlying device layer，detection layer，data processing layer，and data analysis application layer，thereby realizing remote data transmission and remote data monitoring of the underlying substation metering device detection. The Life Cycle Management （LCC） module is designed. The LCC module is designed according to the relationship between safety，efficiency and cycle cost. The state of the substation metering device is evaluated by the random forest algorithm，and the life cycle of the asset is realized. Manage effective needs in terms of information acquisition and status assessment. Experiments show that the technical solution designed in this paper has less error.