The object of this research is to examine the planning principles of Sangju which has an old history The results of the investigation are as follow 1. Sangju placed on the plains in the castle, it is established in Korea Dynasty 2. The formation of Sangju is infruenced Feng-shui. They plants Chestnuts against centipede mountain 3. Sangju is similar to the configuration of the another city in Feng-shui and elements of Component. But, many buildings(jin-Young(Military site), Choong-Ui-Dan, Choong-Yeol-Sa) are associated with the war in Sangju. 4. The City hall is located on the west side of the hotel(Kaek-Sa). It is located on Wang-San which is a place where citizens with symbolism. So, the City hall is higher than Kaek-Sa 5. The cruciform style road which connected with 4 gates was formed in the castle.