Abstract: An air pollution forecast management system including an air quality management device and an Internet of Things (IOT) cloud platform is disclosed. The air quality management device includes a dust particle sensing module being configured to sense gas exhausted from a smoke exhaust flue. The IoT cloud platform is configured to compute, at a second time after a first time, an exhaust gas set of the gas drifting from the first time to the second time by using current-observed meteorological data at the second time, receive a plurality of air-pollution sets at a plurality of geographic locations at the second time, compute a plurality of influencing results of the plurality of air-pollution sets respectively associated with the exhaust gas set, and generate a feedback instruction according to at least one of the plurality of influencing results to control gas emission of the smoke exhaust flue.