With the development of microelectronics technology, memory devices have shown the developing trends toward large capacity, fast speed and low power．Static random access memory(SRAM)，as a member of the memory device family, has made significant advances recently, and has been widely applied in computer, communication and high speed data exchange systems ．But as the capacity of the memory continues to increase, IO flip speed becomes faster, and the power system puts forward higher requirements. Based on the SRAM application system, this paper introduces the problems of the SRAM chip power system in detail, and proposes an evaluation method of SRAM power based on system level.