Abstract: Electric energy data acquire system is used to gather electric energy data from power user, monitor the consumer habit and by this realize the real-time control and management of power grid. The acquisition success rate is the main concern of the electric power enterprise at present. In this paper, the physical structure of electric energy data acquire system was introduced and decomposed into three types of devices and three ways of communication channels. Based on its physical structure, the acquisition failure of the system was classified and corresponding treatment was proposed separately, which could provide reference to raise the acquisition sucess rate.