Abstract: In view of the increasingly serious air pollution,people pay more and more attention to the health of the human body.In this paper,we designed a household-friendly energy-saving PM2.5 monitor to meet the needs of ordinary residents to understand the air quality.The design is based on the IAR development environment by utilizing the CC430F5137 low power mode,CC1101 low power RF,timing wakeup algorithm,sensor detection,low power consumption segment LCD display and other key technologies to achieve the timing of PM2.5 data acquistion,the wireless transmission,and timely update and display.The practice shows that the overall design achieves the effect of energy saving and realizes the purpose of home use.Meanwhile,the energy-saving design can provide some reference to the similar products in the design of low-power.