Our tea culture has been a cultural tradition since the ancient society, which both ritual tea ceremony and life tea ceremony had been prevailed. The tea ceremony was not the only ritual ceremony of a country but also had been loved by ancestors as a routine life ceremony combined with memorial service, Gyubang-darye (Lady s tea ceremony) and Seonbi-darye (Man s tea ceremony).
 Many tools are required to enhance the taste and character of tea which is called the Dadogu . Dadogu consists of Da-gi (茶器) and Da-gu(茶具). As a broad meaning, Da-gi means various tools for making tea, however, as a narrow meaning, Da-gi means a pot for carrying tea water or brewing tea. On the other hand, Da-gu means tools for making teas.
 Among many different materials which are used for Dadogu - gold, silver, copper, iron, ceramics, and onggi(pottery) - ceramics are the major material that had been used. Ceramics are not the only cheap and popular material, but also has relatively warm feeling which is compatible for Da-gu.
 Traditional Onggi had been widely used as a material for Da-gwan (pot for brewing tea), tea cup, tea bowl, Tang-gwan (pot for boiling water), fire pot, Sook-woo (pot for cooling water), Toisoogi (pot for dumping used water), and water jar. Recently, modern Onggi had been looked over again as a material for Da-gu.
 This study is to discuss about ancestor s tea culture through understanding characteristics and material of traditional Dadogu. And moreover, hope to create various Onggi Dadogu by applying concepts and identity of traditional Onggi to modern Onggi.