Environmental air parameters directly affect our daily quality of life, and they can change from day to day or even hour to hour. With rapid industrialization over the past few decades, there is a dramatically increasing demand for people to monitor the local air quality to know how they live and what they breathe. In this work, we proposed an air monitoring system based on the Arduino platform. This environmental air monitoring system is designed to provide an efficient, straightforward and robust solution to monitor the air quality continuously and in real-time. It is a portable system that integrates multiple sensors into a single unit and can be placed anywhere. The acquired results are displayed on a screen and can also be saved on a host computer for further analysis.