With the continuous improvement of memory controller performance,the power consumption becomes higher and higher.High power consumption will cause the chip temperature to rise,affecting the performance of the memory controller.In order to meet the performance requirements of memory controllers and reduce power consumption,it becomes more and more important to manage power consumption in memory controllers.This paper introduces a power management design of memory control system applied to image processing system.By using this power management design,the power consumption of memory system is reduced obviously.