BIM，GIS，and oblique photography contribute independently to the engineering field，but their integration lacks practical experience.BIM focuses on engineering-scale building information；GIS technology focuses on resource information at the urban and watershed scale；oblique photography aims to reflect the real scene of a specific area with high precision.Technical integration will effectively expand the radiation range of engineering construction information and assist engineering decision-making.It helps optimize the construction plan and improve the quality of engineering construction.This paper probes into the integration of BIM，GIS，and oblique photography.Exemplified by Shuangqiao hydro-junction project，the paper matches the BIM model，diorama and spatial data，model data visualization and interaction，and engineering roaming under the GIS platform.The research provides a demonstration experience for the application of BIM + GIS+oblique photography in waterway engineering and gives support for the realization of digital project management at urban and watershed levels.