As urbanization develops since the 21st century and China has always focused on city construction, the gap between rural construction and city construction gradually enlarges, and rural structure is also changed. First, as human society develops at a high speed, some traditional lifestyles and methods of production have changed, featuring a gradual reduction of traditional farming practices, which results in the discard of some rural land. Second, as population structure changes and young people outflows in large numbers, the rural labor is insufficient, bringing about more idle homesteads and the downfall of traditional villages. This study explored idle space in Maolin Village, Xiang'an District, Xiamen City, Fujian Province. In managing the idle space, a sharing model was introduced, and, based on light intervention design, resources were integrated to activate the space before reutilization. After the space attribute is converted, the rural space is therefore publicly shared. By seeking the compound use of public space and rebuilding genius loci for public space, countryside memory is recalled and countryside culture is carried over. With new space incorporated into old space, rural public activities of different kinds are held, enriching villagers' lives and improving their life quality. Idle space can also display its maximum value and is expected to drive the development of new idle spaces in adjacent areas in a way of fanning out from point to area.