Coastal eupseongs, which are mainly built in the period of late Goryeo and early Joseon period, are essential materials in studying the history of Joseon period eupseongs. The purpose of this study is to connect the annexation of local districts with the relocation of local government office, so as to categorize the types of coastal-eupseongs and examine the background of their constructions and relocations. Coastal eupseongs are mainly divided into 'maintenance type' and 'Mergence type' according to the annexation of local districts, and maintenance type is broken down into fortress type and non-fortress type in accordance with the existence of old eupseongs(fortresses). Coastal eupseongs can also be categorized into 'application type' and 'relocation type' depending on whether ex-local government offices were reutilized or relocated. Maintenance type is 'fortress-application type'(Gimhae·Gosung·Old Ulsan-eupseong), 'non-fortress-application type'(New Ulsan-eupseong), 'fortress-relocation type'(Dongrae․Kijang․Geojegohyunseong․ Ulsan(Jwabyeongyoung)-eupseong), 'non-fortress-relocation type'(Sacheon․ Hadong·Jinhae-eupseong·Geojesadeongseong) are differentiated by type. Mergence type is divided into 'Merger of Villages after Castle Relocation Type(Changwon·Namhae·Gonyang-eupseong)', 'Merger of Villages before Castle Relacation Type(Ungcheon-eupseong)'.
Coastal-eupseongs are moved to other places in need of more affluent water supply(Gimhae·Gijang-eupseong) and wider usable area(Namhae·Gohyunseong-eupseong). Eupseongs were enlarged owing to the population growth, caused by annexations of local districts.(Ungcheon-eupseong) 'Seonso'(navy yard) is a unique feature which cannot be seen in inland eupseongs.

Abstract
 1. 서 론
  1-1. 연구 배경 및 목적
  1-2. 연구대상 및 연구방법
 2. 군현의 위상변화와 고읍성 사례
  2-1. 군현의 위상변화(Tab. 2)
  2-2. 김해고읍성(Fig.1, Fig.2)
  2-3. 동래고읍성(Fig.1, Fig.4)
  2-4. 남해고현성(Fig.1)
  2-5. 기장 고읍성(Fig.1)
  2-6. 창원 회원현성(Fig.1, Fig.5)
  2-7. 울산 고읍성과 울산읍치 이동(Fig. 3)
 3. 조선시대 읍성 축조유형
  3-1. 조선시대 읍성축조 유형구분(Tab.3)
  3-2. 고읍성 활용 읍성축조형
  3-3. 고읍치 활용 읍성축조형
  3-4. 고읍성에서 읍성축조 후 이건형
  3-5. 고읍치에서 읍성축조 후 이건형
  3-6. 선 군현병합, 후 읍성축조형
  3-7. 선 읍성축조, 후 군현병합형
 4. 조선시대 읍성의 이건 배경
  4-1. 군현의 위상변화와 읍성축조 시기(Fig.7)
  4-2. 군현의 위상변화와 읍성의 규모(Fig.9)
  4-3. 선호 입지변화
  4-4. 용수확보
  4-5. 조선시대 연해읍성과 선소(Fig. 1, Tab. 4)
 5. 결론
 References

• 권순강(부산대학교 건축학과 박사수료, (재)우리문화재연구원 건축고고과장) | Kwon Soon-Kang Corresponding Author
• 이호열(부산대학교 건설융합학부 건축학전공 교수) | Lee Ho-Yeol