Southwest Coast Geopark officially joined the Taiwan Geoparks Network in October 2014. As the Geopark region has an extremely long coastal line, as well as sand dunes, sandbars, lagoons, river mouths and other unique coastal and marshland scenic sights, hence it produces a huge and abundant variety of fishes, shrimps, shellfishes, sandpipers, wading birds, herons and all types of wet marshlands wildlife. In addition, this is an area that was developed relatively early when the Han Chinese came to Taiwan, therefore salt making, breeding, fishing and other related industries have flourished, and many cultural heritage sites with deep historical value have been preserved.

It is located in the coastal areas of Yunlin, Chiayi and Tainan, and they are all flat sand beaches, sand bars, lagoons and estuarine wetlands. They are mainly under the jurisdiction of Southwest Coast National Scenic Area Administration, Taiwan Tourism Bureau. The change of coastal sand bar witnessed the evolution of Taiwan's history and geography. It evolved from a lagoon sand bar more than 100 years ago to a salt field and a fish farm. With the closing of salt field, it has become an important habitats for local bird ecology.