Based on the analysis of indoor ultravilet air purifier control system, the hardware circuit and software are designed and researched,and the control system for new purifier based on the ATmega128 core processors of AVR microcontroller is achieved.This control system is a integrated system of single-chipped computer control technology,LCD technology,automatic data collection technology,sensor technology,motor control technology.The control system which is proved by the laboratory test and application have the advantages of safety,stabiliation and energy conservation and so on.