Abstract: Country and city are both important living environment juxtaposed with each other. As to the country, or the rural living environments, the research paradigm for the spatial form thereof needs to be updated further to explore the evolution mechanism of rural spatial form. This research firstly organizes the full-scale level method for open building that integrates the external and internal spaces of building, and refines the “skeleton - infill” relationship between the levels and the cross-level logical core for form governance levels. Secondly, in the context of rural living environment, the research conducts level expansion and adjustment, determines the main research content of each level, and constructs the logical relationship framework between levels. Finally, taking Xiaqiao Village in Taishun County, Wenzhou City, Zhejiang Province as an example, the research, from the perspectives of external and internal factors, interprets the cross-level transmission and transformation mechanism of spatial form, and under the “full-scale and cross-level” prospective, constructs a level system for the spatial form research of rural living environment including seven spatial levels: region, settlement, community, neighborhood, homestead, residential unit, and room, in hope of providing insight into cognitive methods to deepen the understanding of rural built environment in urban-rural transition.