Soil and Water Conservation Bureau, Council of Agriculture, Executive Yuan, has been committed to slopeland disaster prevention and mitigation in past decades. In past years, large amounts of precious GIS data have been collected from the implementation results of the plans. To make these GIS resources available for better integration and application, the "Big Geospatial Information System" (BigGIS) is established. With BigGIS, Users can set a variety of search criteria to quickly access huge amounts of remote sensing images. Meanwhile, through the 3D mode or the multi-window viewing with a variety of customized tools and online digital functions, BigGIS improve the execution and planning effectiveness for soil and water conservation. Also, BigGIS satisfies various users' needs by its base maps or API services provided from multiple organizations. All in all, BigGIS is now becoming a new generation GIS that can better assist government officials and engineers in management of soil and water conservation.