A coupler is an electrical concept that is a device capable of exchanging information between two or more circuits.The design starting point is based on this basic electrical component, forming two sets of small modular structural units through the connection and organization of the members. By replicating these structural units, a space device that can be extended and replicated is formed. One set is set on the south side of the site, which is a large roof formed by a set of small inclined angle wooden structures, with the lighting surface closely attached to the green belt. The other set is set on the north side, which is a multi-functional market device built by a set of wooden structures,consisting of a large inclined angle vertical roof, flower garden, and multi-purpose platform