The disclosure provides a method and a system for muck processing in a smart city based on Internet of Things. The method is performed by a management platform, including: determining a target monitoring device of a target site based on the construction site information, obtaining muck truck monitoring data of the target site through the target monitoring device, obtaining dropped muck situation information of the muck truck in different time periods and determining muck truck management information by performing muck processing information analysis based on the muck truck monitoring data, determining vehicle dust situation information through a fourth model, determining a dropped muck reason or a dust reason through a third model, and issuing different processing instructions based on different reasons of dropped muck and/or dust produced by the muck truck.