Daejeon started as a small village called Hanbat. Daejeon started to grow into a large city during the Japanese occupation period. Since the location of Daejeon is near to Seoul, the Ho-Nam train was opened in 1914. In 1949, Daejeon was no longer a part of Chungcheong province. It became an independent metropolitan city. It has the same role as a province.
Today, the city is important as a local self-governing city in Korea. As the population of the city grew, the first subway station in Daejeon was opened in 2006. The formal president Noh Mu Hyun once planned to move some of the public administration buildings in Seoul to Daejeon.
Daejeon is seen as a city of science and technology. It has Daedeock science research town. It was built to support scientists and researchers in Daejeon. In 1993, the city held the Daejeon Expo Festival.
One of the main tourist sites in Daejeon is Yuseong Hot Spring. It is near to subway station and many foreigners visit to enjoy the spa. Another famous site is Daejeon's prehistoric site. It is in Seo-gu. The site includes the simulation of the lives of people from prehistoric ages. Famous people from Daejeon are Park Se Ri, a world famous golfer, and celebrities such as Kwon Sang Woo and Park Hae Mi.