Urban street scale atmospheric pollution assessment method and device and storage medium

The invention discloses an urban street scale atmospheric pollution assessment method and device and a storage medium, and belongs to the technical field of atmospheric pollution assessment, and the method comprises the steps: obtaining geographic information data, emission source data and background meteorological data of a target area; generating a microenvironment dynamic data set based on the emission source data and the background meteorological data; generating a three-dimensional live-action numerical simulation model of the target area based on the geographic information data; based on the microenvironment dynamic scene library and the three-dimensional live-action numerical simulation model, the atmospheric pollutant concentration field distribution and the air quality index of the target area are obtained through a CFD method, and atmospheric pollution assessment is completed; by performing high-resolution modeling on urban streets, combining emission source data and background meteorological data,