The bus is a cause of air pollution, and people waiting for the buses always inadvertently inhale exhaust gas. Filter Stop is a bus stop that specifically cleans the exhaust of the bus stop. It adapts the Bernoulli's principle to suck in the exhaust gas from below, clean it through the internal TPA dust collection technology, and then release the clean air from the top to provide a good waiting environment. It can also be used as a system for detecting air quality in cities. The data collected by each Filter Stop can be used to learn the overall air quality of the city and further strengthen management and corresponding adaptations.