The main indicators of air monitoring include PM2.5, PM10, SO2, NO2, CO and other particles and gases. PM stands for Particulate Matter with an aerodynamic equivalent diameter of 2.5 microns or less, usually Fine Particulate Matter (PM2.5) and Respirable Particulate Matter (PM10). SO2 and NO2, short for sulfur dioxide and nitrogen dioxide, are among the main pollutants in the air. CO is the abbreviation of carbon monoxide, colorless, tasteless, non-irritating harmful gas, easy to combine with hemoglobin in the human body, resulting in human hypoxia. The monitoring data of these indicators can reflect the state of air quality and the degree of pollution. Air monitoring system is an important tool for important departments such as environmental protection departments and medical institutions, it regularly collects air samples to determine the concentration of various pollutants in the air, and provides data support for management departments to take effective measures to reduce pollution and protect public health. For individuals, knowing the air quality and pollution levels around us can help us choose the right time for travel and activities.