diff --git a/.gitignore b/.gitignore
index 71ee9e4..3727504 100644
--- a/.gitignore
+++ b/.gitignore
@@ -37,4 +37,6 @@ out/
 .vscode/
 
 ### application.properties ###
-src/main/resources/application-local.yml
\ No newline at end of file
+src/main/resources/application-local.yml
+
+src/main/resources/google-service-key.json
\ No newline at end of file
diff --git a/src/main/java/com/onebridge/ouch/controller/hospital/HospitalController.java b/src/main/java/com/onebridge/ouch/controller/hospital/HospitalController.java
new file mode 100644
index 0000000..c22ea80
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/controller/hospital/HospitalController.java
@@ -0,0 +1,51 @@
+package com.onebridge.ouch.controller.hospital;
+
+import java.util.List;
+
+import org.springframework.web.bind.annotation.*;
+
+import com.onebridge.ouch.dto.hospital.response.AllDepartmentResponse;
+import com.onebridge.ouch.dto.hospital.response.HospitalDetailResponse;
+import com.onebridge.ouch.dto.hospital.response.HospitalDistanceResponse;
+import com.onebridge.ouch.service.department.DepartmentService;
+import com.onebridge.ouch.service.hospital.HospitalDetailService;
+import com.onebridge.ouch.service.hospital.HospitalSearchService;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import lombok.RequiredArgsConstructor;
+
+@RestController
+@Tag(name = "병원 API", description = "병원 관련 API 입니다.")
+@RequestMapping("/hospitals")
+@RequiredArgsConstructor
+public class HospitalController {
+	private final HospitalSearchService hospitalSearchService;
+	private final HospitalDetailService hospitalDetailService;
+	private final DepartmentService departmentService;
+
+	@Operation(summary = "거리 순 병원 조회 API", description = "입력된 진료과, 위도(lat), 경도(lng)를 기준으로 병원 목록을 거리 순으로 조회합니다. "
+		+ "진료과를 입력하지 않으면 입력된 위도, 경도를 기준으로 모든 병원 목록을 거리 순으로 조회합니다. 위도, 경도는 필수로 입력해야 합니다. ")
+	@GetMapping("/search")
+	public List<HospitalDistanceResponse> searchHospitals(
+		@RequestParam(required = false) String department,
+		@RequestParam Double lat,
+		@RequestParam Double lng,
+		@RequestParam(defaultValue = "0") int page,
+		@RequestParam(defaultValue = "20") int size
+	) {
+		return hospitalSearchService.searchHospitals(department, lat, lng, page, size);
+	}
+
+	@Operation(summary = "병원 상세 조회 API", description = "입력된 병원 고유ID를 통해 병원 상세 정보를 조회합니다.")
+	@GetMapping("/{ykiho}")
+	public HospitalDetailResponse getHospitalDetail(@PathVariable String ykiho) {
+		return hospitalDetailService.getHospitalDetail(ykiho);
+	}
+
+	@Operation(summary = "진료과 목록 조회 API", description = "모든 진료과 목록을 조회합니다.")
+	@GetMapping("/departments")
+	public List<AllDepartmentResponse> getDepartments() {
+		return departmentService.getAllDepartments();
+	}
+}
diff --git a/src/main/java/com/onebridge/ouch/domain/Department.java b/src/main/java/com/onebridge/ouch/domain/Department.java
deleted file mode 100644
index b81553f..0000000
--- a/src/main/java/com/onebridge/ouch/domain/Department.java
+++ /dev/null
@@ -1,22 +0,0 @@
-package com.onebridge.ouch.domain;
-
-import com.onebridge.ouch.domain.common.BaseEntity;
-
-import jakarta.persistence.*;
-import lombok.*;
-
-@Entity
-@Getter
-@Builder
-@NoArgsConstructor(access = AccessLevel.PROTECTED)
-@AllArgsConstructor
-public class Department extends BaseEntity {
-
-	@Id
-	@GeneratedValue(strategy = GenerationType.IDENTITY)
-	private Long id;
-
-	@Column(nullable = false, length = 30)
-	private String name;
-}
-
diff --git a/src/main/java/com/onebridge/ouch/domain/Hospital.java b/src/main/java/com/onebridge/ouch/domain/Hospital.java
index 2a5e79d..9dcde89 100644
--- a/src/main/java/com/onebridge/ouch/domain/Hospital.java
+++ b/src/main/java/com/onebridge/ouch/domain/Hospital.java
@@ -1,31 +1,57 @@
 package com.onebridge.ouch.domain;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import com.onebridge.ouch.domain.common.BaseEntity;
-import com.onebridge.ouch.domain.mapping.HospitalDepartment;
-
 import jakarta.persistence.*;
 import lombok.*;
 
 @Entity
 @Getter
-@Builder
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@AllArgsConstructor
-public class Hospital extends BaseEntity {
+public class Hospital {
 
 	@Id
-	@GeneratedValue(strategy = GenerationType.IDENTITY)
-	private Long id;
+	//@Column(name = "암호화요양기호")
+	private String ykiho;               // 암호화요양기호 (PK)
+
+	//@Column(name = "요양기관명")
+	private String name;                // 병원 이름
+
+	//@Column(name = "종별코드명")
+	private String type;                // 종별코드명(병원/의원/종합병원 등)
+
+	//@Column(name = "시도코드명")
+	private String sido;                // 시/도명
+
+	//@Column(name = "시군구코드명")
+	private String sigungu;             // 시/군/구명
+
+	//@Column(name = "읍면동")
+	private String eupmyeondong;        // 읍면동
+
+	//@Column(name = "우편번호")
+	private String zipcode;             // 우편번호
+
+	//@Column(name = "주소")
+	private String address;             // 주소
+
+	//@Column(name = "전화번호")
+	private String tel;                 // 전화번호
 
-	@Column(nullable = false, length = 50)
-	private String name;
+	//@Column(name = "좌표(X)")
+	private Double lat;                 // 좌표(X) = 위도
 
-	@Column(nullable = false, length = 100)
-	private String address;
+	//@Column(name = "좌표(Y)")
+	private Double lng;                 // 좌표(Y) = 경도
 
-	@OneToMany(mappedBy = "hospital", cascade = CascadeType.ALL, orphanRemoval = true)
-	private List<HospitalDepartment> hospitalDepartmentList = new ArrayList<>();
+	// @Id
+	// @GeneratedValue(strategy = GenerationType.IDENTITY)
+	// private Long id;
+	//
+	// @Column(nullable = false, length = 50)
+	// private String name;
+	//
+	// @Column(nullable = false, length = 100)
+	// private String address;
+	//
+	// @OneToMany(mappedBy = "hospital", cascade = CascadeType.ALL, orphanRemoval = true)
+	// private List<HospitalDepartment> hospitalDepartmentList = new ArrayList<>();
 }
diff --git a/src/main/java/com/onebridge/ouch/domain/mapping/HospitalDepartment.java b/src/main/java/com/onebridge/ouch/domain/mapping/HospitalDepartment.java
index a86eb63..34dbddf 100644
--- a/src/main/java/com/onebridge/ouch/domain/mapping/HospitalDepartment.java
+++ b/src/main/java/com/onebridge/ouch/domain/mapping/HospitalDepartment.java
@@ -1,28 +1,22 @@
 package com.onebridge.ouch.domain.mapping;
 
-import com.onebridge.ouch.domain.Hospital;
-import com.onebridge.ouch.domain.Department;
-import com.onebridge.ouch.domain.common.BaseEntity;
-
 import jakarta.persistence.*;
 import lombok.*;
 
 @Entity
 @Getter
-@Builder
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@AllArgsConstructor
-public class HospitalDepartment extends BaseEntity {
+public class HospitalDepartment {
 
 	@Id
 	@GeneratedValue(strategy = GenerationType.IDENTITY)
 	private Long id;
 
-	@ManyToOne(fetch = FetchType.LAZY)
-	@JoinColumn(name = "department_id")
-	private Department department;
+	private String ykiho;                   // 암호화요양기호 (병원 식별자)
+	private Long departmentCode;            // 진료과목코드
+	private String departmentName;          // 진료과목명
+	private Integer specialistCount;        // 전문의 수
 
-	@ManyToOne(fetch = FetchType.LAZY)
-	@JoinColumn(name = "hospital_id")
-	private Hospital hospital;
+	// 병원-진료과 unique 인덱스 (ykiho + departmentCode) 추가 권장
+	// @Table(uniqueConstraints = {@UniqueConstraint(columnNames = {"ykiho", "departmentCode"})})
 }
diff --git a/src/main/java/com/onebridge/ouch/domain/tempDomain/Department.txt b/src/main/java/com/onebridge/ouch/domain/tempDomain/Department.txt
new file mode 100644
index 0000000..9fe1e12
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/domain/tempDomain/Department.txt
@@ -0,0 +1,17 @@
+package com.onebridge.ouch.domain;
+
+
+import jakarta.persistence.*;
+import lombok.*;
+
+@Entity
+@Getter
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
+public class Department {
+
+	@Id
+	private Long code;            // 진료과목코드(PK, 필요 없으면 생략)
+	private String nameKr;        // 진료과목 한글명
+	private String nameEn;        // 진료과목 영문명
+}
+
diff --git a/src/main/java/com/onebridge/ouch/dto/hospital/response/AllDepartmentResponse.java b/src/main/java/com/onebridge/ouch/dto/hospital/response/AllDepartmentResponse.java
new file mode 100644
index 0000000..518f4c1
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/dto/hospital/response/AllDepartmentResponse.java
@@ -0,0 +1,10 @@
+package com.onebridge.ouch.dto.hospital.response;
+
+import lombok.Getter;
+
+@Getter
+public class AllDepartmentResponse {
+	private Long code;
+	private String nameKr;
+	private String nameEn;
+}
diff --git a/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDetailResponse.java b/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDetailResponse.java
new file mode 100644
index 0000000..71184ba
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDetailResponse.java
@@ -0,0 +1,30 @@
+package com.onebridge.ouch.dto.hospital.response;
+
+import java.util.List;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class HospitalDetailResponse {
+	private String ykiho;
+	private String name;
+	private String type;         // 종별코드명
+	private String zipcode;
+	private String address;
+	private Double lat;
+	private Double lng;
+	private String tel;
+	private List<DepartmentInfo> departments;
+
+	// Getter/Setter
+	@Getter
+	@Setter
+	public static class DepartmentInfo {
+		private String departmentName;
+		private Integer specialistCount; // 전문의 수
+
+		// Getter/Setter
+	}
+}
diff --git a/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDistanceResponse.java b/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDistanceResponse.java
new file mode 100644
index 0000000..bcd3f31
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/dto/hospital/response/HospitalDistanceResponse.java
@@ -0,0 +1,16 @@
+package com.onebridge.ouch.dto.hospital.response;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class HospitalDistanceResponse {
+	private String ykiho;
+	private String name;
+	private String address;
+	private String tel;
+	private Double lat;
+	private Double lng;
+	private Double distance; //km
+}
diff --git a/src/main/java/com/onebridge/ouch/repository/hospital/HospitalDepartmentRepository.java b/src/main/java/com/onebridge/ouch/repository/hospital/HospitalDepartmentRepository.java
new file mode 100644
index 0000000..a034937
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/repository/hospital/HospitalDepartmentRepository.java
@@ -0,0 +1,14 @@
+package com.onebridge.ouch.repository.hospital;
+
+import java.util.List;
+
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+import com.onebridge.ouch.domain.mapping.HospitalDepartment;
+
+@Repository
+public interface HospitalDepartmentRepository extends JpaRepository<HospitalDepartment, Long> {
+
+	List<HospitalDepartment> findByYkiho(String ykiho);
+}
diff --git a/src/main/java/com/onebridge/ouch/repository/hospital/HospitalRepository.java b/src/main/java/com/onebridge/ouch/repository/hospital/HospitalRepository.java
new file mode 100644
index 0000000..a6fec35
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/repository/hospital/HospitalRepository.java
@@ -0,0 +1,49 @@
+package com.onebridge.ouch.repository.hospital;
+
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+
+import com.onebridge.ouch.domain.Hospital;
+
+@Repository
+public interface HospitalRepository extends JpaRepository<Hospital, String> {
+
+	// 전체 병원 거리순 정렬 (진료과 미입력시)
+	@Query(value =
+		"SELECT h.ykiho, h.name, h.address, h.tel, h.lat, h.lng, " +
+			" (6371 * acos(cos(radians(:lat)) * cos(radians(h.lat)) " +
+			" * cos(radians(h.lng) - radians(:lng)) + sin(radians(:lat)) * sin(radians(h.lat)))) as distance " +
+			"FROM hospital h " +
+			"WHERE h.lat IS NOT NULL AND h.lng IS NOT NULL " +
+			"ORDER BY distance ASC " +
+			"LIMIT :limit OFFSET :offset",
+		nativeQuery = true)
+	List<Object[]> findAllOrderByDistance(
+		@Param("lat") double lat,
+		@Param("lng") double lng,
+		@Param("limit") int limit,
+		@Param("offset") int offset
+	);
+
+	// 진료과 기반 병원 거리순 정렬 (병원-진료과 조인)
+	@Query(value =
+		"SELECT h.ykiho, h.name, h.address, h.tel, h.lat, h.lng, " +
+			" (6371 * acos(cos(radians(:lat)) * cos(radians(h.lat)) " +
+			" * cos(radians(h.lng) - radians(:lng)) + sin(radians(:lat)) * sin(radians(h.lat)))) as distance " +
+			"FROM hospital h " +
+			"JOIN hospital_department hd ON h.ykiho = hd.ykiho " +
+			"WHERE hd.department_name = :departmentName AND h.lat IS NOT NULL AND h.lng IS NOT NULL " +
+			"ORDER BY distance ASC " +
+			"LIMIT :limit OFFSET :offset",
+		nativeQuery = true)
+	List<Object[]> findByDepartmentOrderByDistance(
+		@Param("departmentName") String departmentName,
+		@Param("lat") double lat,
+		@Param("lng") double lng,
+		@Param("limit") int limit,
+		@Param("offset") int offset
+	);
+}
diff --git a/src/main/java/com/onebridge/ouch/service/department/DepartmentService.java b/src/main/java/com/onebridge/ouch/service/department/DepartmentService.java
new file mode 100644
index 0000000..14eb2ba
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/service/department/DepartmentService.java
@@ -0,0 +1,29 @@
+package com.onebridge.ouch.service.department;
+
+import java.io.InputStream;
+import java.util.List;
+
+import org.springframework.core.io.ClassPathResource;
+import org.springframework.stereotype.Service;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.onebridge.ouch.dto.hospital.response.AllDepartmentResponse;
+
+import jakarta.annotation.PostConstruct;
+
+@Service
+public class DepartmentService {
+	private List<AllDepartmentResponse> departmentList;
+
+	@PostConstruct
+	public void init() throws Exception {
+		ObjectMapper mapper = new ObjectMapper();
+		InputStream input = new ClassPathResource("data/department.json").getInputStream();
+		departmentList = mapper.readValue(input, new TypeReference<List<AllDepartmentResponse>>() {});
+	}
+
+	public List<AllDepartmentResponse> getAllDepartments() {
+		return departmentList;
+	}
+}
diff --git a/src/main/java/com/onebridge/ouch/service/hospital/HospitalDetailService.java b/src/main/java/com/onebridge/ouch/service/hospital/HospitalDetailService.java
new file mode 100644
index 0000000..e6af28c
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/service/hospital/HospitalDetailService.java
@@ -0,0 +1,53 @@
+package com.onebridge.ouch.service.hospital;
+
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import com.onebridge.ouch.domain.Hospital;
+import com.onebridge.ouch.domain.mapping.HospitalDepartment;
+import com.onebridge.ouch.dto.hospital.response.HospitalDetailResponse;
+import com.onebridge.ouch.repository.hospital.HospitalDepartmentRepository;
+import com.onebridge.ouch.repository.hospital.HospitalRepository;
+
+@Service
+public class HospitalDetailService {
+	private final HospitalRepository hospitalRepository;
+	private final HospitalDepartmentRepository hospitalDepartmentRepository;
+
+	public HospitalDetailService(HospitalRepository hospitalRepository, HospitalDepartmentRepository hospitalDepartmentRepository) {
+		this.hospitalRepository = hospitalRepository;
+		this.hospitalDepartmentRepository = hospitalDepartmentRepository;
+	}
+
+	public HospitalDetailResponse getHospitalDetail(String ykiho) {
+		Hospital hospital = hospitalRepository.findById(ykiho)
+			.orElseThrow(() -> new RuntimeException("병원 정보를 찾을 수 없습니다."));
+
+		// 해당 병원의 진료과 + 전문의 수
+		List<HospitalDepartment> deptList = hospitalDepartmentRepository.findByYkiho(ykiho);
+
+		List<HospitalDetailResponse.DepartmentInfo> departments = deptList.stream()
+			.map(d -> {
+				HospitalDetailResponse.DepartmentInfo info = new HospitalDetailResponse.DepartmentInfo();
+				info.setDepartmentName(d.getDepartmentName());
+				info.setSpecialistCount(d.getSpecialistCount());
+				return info;
+			})
+			.collect(Collectors.toList());
+
+		// 상세 응답 구성
+		HospitalDetailResponse detail = new HospitalDetailResponse();
+		detail.setYkiho(hospital.getYkiho());
+		detail.setName(hospital.getName());
+		detail.setType(hospital.getType());
+		detail.setZipcode(hospital.getZipcode());
+		detail.setAddress(hospital.getAddress());
+		detail.setLat(hospital.getLat());
+		detail.setLng(hospital.getLng());
+		detail.setTel(hospital.getTel());
+		detail.setDepartments(departments);
+		return detail;
+	}
+}
diff --git a/src/main/java/com/onebridge/ouch/service/hospital/HospitalSearchService.java b/src/main/java/com/onebridge/ouch/service/hospital/HospitalSearchService.java
new file mode 100644
index 0000000..facbb98
--- /dev/null
+++ b/src/main/java/com/onebridge/ouch/service/hospital/HospitalSearchService.java
@@ -0,0 +1,51 @@
+package com.onebridge.ouch.service.hospital;
+
+import org.springframework.stereotype.Service;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.onebridge.ouch.dto.hospital.response.HospitalDistanceResponse;
+import com.onebridge.ouch.repository.hospital.HospitalRepository;
+
+@Service
+public class HospitalSearchService {
+	private final HospitalRepository hospitalRepository;
+
+	public HospitalSearchService(HospitalRepository hospitalRepository) {
+		this.hospitalRepository = hospitalRepository;
+	}
+
+	public List<HospitalDistanceResponse> searchHospitals(
+		String department,
+		Double lat,
+		Double lng,
+		int page,
+		int size
+	) {
+		if (lat == null || lng == null) {
+			throw new IllegalArgumentException("좌표(lat, lng)는 필수입니다.");
+		}
+		int offset = page * size;
+		List<Object[]> rawList;
+		if (department != null && !department.isBlank()) {
+			rawList = hospitalRepository.findByDepartmentOrderByDistance(department, lat, lng, size, offset);
+		} else {
+			rawList = hospitalRepository.findAllOrderByDistance(lat, lng, size, offset);
+		}
+
+		List<HospitalDistanceResponse> result = new ArrayList<>();
+		for (Object[] row : rawList) {
+			HospitalDistanceResponse dto = new HospitalDistanceResponse();
+			// row 순서는 hospital 테이블 컬럼 순서 + 마지막에 distance
+			dto.setYkiho((String) row[0]);
+			dto.setName((String) row[1]);
+			dto.setAddress((String) row[2]);
+			dto.setTel((String) row[3]);
+			dto.setLat(row[4] != null ? ((Number)row[4]).doubleValue() : null);
+			dto.setLng(row[5] != null ? ((Number)row[5]).doubleValue() : null);
+			dto.setDistance(row[6] != null ? ((Number)row[6]).doubleValue() : null);
+			result.add(dto);
+		}
+		return result;
+	}
+}
diff --git a/src/main/resources/data/department.json b/src/main/resources/data/department.json
new file mode 100644
index 0000000..59cafb2
--- /dev/null
+++ b/src/main/resources/data/department.json
@@ -0,0 +1,21 @@
+[
+  { "code": 1,  "nameKr": "내과",         "nameEn": "Internal Medicine" },
+  { "code": 23, "nameKr": "가정의학과",   "nameEn": "Family Medicine" },
+  { "code": 4,  "nameKr": "외과",         "nameEn": "General Surgery" },
+  { "code": 5,  "nameKr": "정형외과",     "nameEn": "Orthopedic Surgery" },
+  { "code": 6,  "nameKr": "신경외과",     "nameEn": "Neurosurgery" },
+  { "code": 2,  "nameKr": "신경과",       "nameEn": "Neurology" },
+  { "code": 3,  "nameKr": "정신건강의학과", "nameEn": "Psychiatry" },
+  { "code": 7,  "nameKr": "흉부외과",     "nameEn": "Thoracic Surgery" },
+  { "code": 8,  "nameKr": "성형외과",     "nameEn": "Plastic Surgery" },
+  { "code": 9,  "nameKr": "마취통증의학과", "nameEn": "Anesthesiology & Pain Medicine" },
+  { "code": 10, "nameKr": "산부인과",     "nameEn": "Obstetrics & Gynecology" },
+  { "code": 11, "nameKr": "소아청소년과", "nameEn": "Pediatrics" },
+  { "code": 12, "nameKr": "안과",         "nameEn": "Ophthalmology" },
+  { "code": 13, "nameKr": "이비인후과",   "nameEn": "Otorhinolaryngology (ENT)" },
+  { "code": 14, "nameKr": "피부과",       "nameEn": "Dermatology" },
+  { "code": 15, "nameKr": "비뇨의학과",   "nameEn": "Urology" },
+  { "code": 21, "nameKr": "재활의학과",   "nameEn": "Rehabilitation Medicine" },
+  { "code": 49, "nameKr": "치과",         "nameEn": "Dentistry" },
+  { "code": 24, "nameKr": "응급의학과",   "nameEn": "Emergency Medicine" }
+]