The pollution items measured by the online information updated on the Taiwan Government's open data platform include six types: ozone (O3), fine aerosol (PM2.5), suspended particulates (PM10), carbon monoxide (CO), and sulfur dioxide ( SO2) and nitrogen dioxide (NO2), the degree of influence of different pollutants on human health, respectively, is converted into the sub-indicator value, and then the maximum value of each sub-indicator of the day is the air quality index value (AQI) of the station on the day of the station. .