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In this paper, the development of the single-phase electric energy acquisition system and the demand, mainly to explore a simple single phase electric energy acquisition system of the overall structure and each part of circuit design. The system is mainly composed of power acquisition module, clock module, storage module, MCU control module, power module and LCD display module. Among them by ADE7755 to realize the collection of electric energy, through AT89S51 control of electrical energy storage and LCD display.