Journal of Digital Information Management Xin Liu, Chengyu Ma, Xueyong Yang, Chongyang Yang, Yongfa Diao 13 6 2015 http://dline.info/fpaper/jdim/v13i6/v13i6_10.pdf SO2 and NOx are important components of atmospheric pollutants produced by coal combustion process and significant emissions of these gases keep deteriorating urban air quality and cause a great threat to soil, water and forest. The increasingly serious environmental pollution not only resulted in significant economic losses, but also had a great impact on human health. Application of automated on-line monitoring system is one of the effective ways to improve environmental monitoring technology. Therefore, according to actual needs, automated environmental monitoring technology is applied to build up an environmental monitoring system with intelligence, high precision and high reliability, which can be used in the specific environment of daily living and production. This study puts forward an automatic environmental monitoring technology. With comprehensive consideration of working environment particularity of the environmental parameter monitoring system as well as working characteristics of Single Chip Microcomputer (SCM) and front-end sensor, a design scheme for environmental parameter monitoring system with AT89C52 as the core is put forward. With a combination of data acquisition, analysis and processing, display and data communications, the scheme can ensure the efficient and stable realization of all design requirements by the system. According to the design requirements, signal acquisition and processing is realized, corresponding actuators are controlled and necessary assessment is provided. Meanwhile, all data are centralized displayed and uploaded to upper computer.