Mokpo bridge is planed by purpose to improve accessibility between physical distribution establishment such as Mokpo new outer port and Muan international airport and to cope efficiently Traffic demand between ambit by development of north port and new outer port. Construction of Mokpo bridge can achieve role of detour road that take place of line No.1capital in Mokpo, and can plan a part of port in Mokpo zone. Main bridge span is decided for ship sailing safety security by 500M through ship control simulation. Superstructure is designed to cable stayed bridge with steel composite type suitable to long span. Approach bridge is designed as composite steel box girder of 80/56M mixed spanary that harmonized with main span and provided an open view. Considering depth of water and soil condition, foundation is designed as various type such as precast caisson, square shape caisson, case-in-place pile, and spread footing