Abstract: Modeling spatial features in land and housing geographic information system (GIS) based on Geographic Markup Language (GML) is studied. The characteristics of the land and housing spatial features are analyzed, and the land and housing spatial features description based on GML is put forward. A schema defining the GML structure is given, in which both the geometry and attribute information of the features are incorporated, and the relationship between these features is described by the member model. The query models of the land and housing spatial features and the topology relationship between them are further presented, and a query algorithm is given based on XML and XQuery technology. An application system used to manage land and housing information is developed based on JAVA, DOM and SAX. The implementation of the proposed models is tested and the result proves the capability of the models and methods.