diff --git a/src/main/java/com/klaroworks/runtime/rolematrix/exception/Exceptions.java b/src/main/java/com/klaroworks/runtime/rolematrix/exception/Exceptions.java
new file mode 100644
index 0000000..90d1401
--- /dev/null
+++ b/src/main/java/com/klaroworks/runtime/rolematrix/exception/Exceptions.java
@@ -0,0 +1,72 @@
+package com.klaroworks.runtime.rolematrix.exception;
+
+import org.springframework.http.HttpStatus;
+
+/** 도메인 예외 기본 클래스 */
+public abstract class DomainException extends RuntimeException {
+    private final String errorCode;
+    private final HttpStatus defaultStatus;
+
+    protected DomainException(String message, String errorCode, HttpStatus defaultStatus) {
+        super(message);
+        this.errorCode = errorCode;
+        this.defaultStatus = defaultStatus;
+    }
+
+    protected DomainException(String message, String errorCode, HttpStatus defaultStatus, Throwable cause) {
+        super(message, cause);
+        this.errorCode = errorCode;
+        this.defaultStatus = defaultStatus;
+    }
+
+    public String getErrorCode() { return errorCode; }
+    public HttpStatus getDefaultStatus() { return defaultStatus; }
+}
+
+/** 역할 매트릭스를 찾을 수 없을 때 */
+class RoleMatrixNotFoundException extends DomainException {
+    private final Long roleMatrixId;
+    public RoleMatrixNotFoundException(Long roleMatrixId) {
+        super(String.format("역할 매트릭스를 찾을 수 없습니다. ID: %d", roleMatrixId), "NOT_FOUND_ROLE_MATRIX", HttpStatus.NOT_FOUND);
+        this.roleMatrixId = roleMatrixId;
+    }
+    public Long getRoleMatrixId() { return roleMatrixId; }
+}
+
+/** 중복된 역할 매트릭스 */
+class DuplicateRoleMatrixException extends DomainException {
+    private final String matrixName;
+    public DuplicateRoleMatrixException(String matrixName) {
+        super(String.format("이미 존재하는 역할 매트릭스입니다. 이름: %s", matrixName), "CONFLICT_DUPLICATE_MATRIX", HttpStatus.CONFLICT);
+        this.matrixName = matrixName;
+    }
+    public String getMatrixName() { return matrixName; }
+}
+
+/** 입력 검증 실패 */
+class ValidationException extends RuntimeException {
+    private final String errorCode;
+    public ValidationException(String message) { super(message); this.errorCode = "VAL_INVALID_INPUT"; }
+    public ValidationException(String message, String errorCode) { super(message); this.errorCode = errorCode; }
+    public String getErrorCode() { return errorCode; }
+}
+
+/** 인프라 예외 기본 클래스 */
+abstract class InfrastructureException extends RuntimeException {
+    private final String errorCode;
+    private final HttpStatus defaultStatus;
+    protected InfrastructureException(String message, String errorCode, HttpStatus defaultStatus) {
+        super(message); this.errorCode = errorCode; this.defaultStatus = defaultStatus;
+    }
+    protected InfrastructureException(String message, String errorCode, HttpStatus defaultStatus, Throwable cause) {
+        super(message, cause); this.errorCode = errorCode; this.defaultStatus = defaultStatus;
+    }
+    public String getErrorCode() { return errorCode; }
+    public HttpStatus getDefaultStatus() { return defaultStatus; }
+}
+
+/** 데이터베이스 접근 예외 */
+class DataAccessException extends InfrastructureException {
+    public DataAccessException(String message) { super(message, "SYS_DATABASE_ERROR", HttpStatus.INTERNAL_SERVER_ERROR); }
+    public DataAccessException(String message, Throwable cause) { super(message, "SYS_DATABASE_ERROR", HttpStatus.INTERNAL_SERVER_ERROR, cause); }
+}