diff --git a/lib/build.gradle b/lib/build.gradle
index e92ee5a..e303eba 100644
--- a/lib/build.gradle
+++ b/lib/build.gradle
@@ -9,8 +9,19 @@ plugins {
     id 'maven-publish'
 }
 
+sourceSets {
+    main {
+        java {
+            srcDir 'src/main/java'
+        }
+        resources {
+            srcDir 'src/main/resources'
+        }
+    }
+}
+
 group 'io.github.team-xquare'
-version '0.0.8'
+version '0.0.9'
 
 repositories {
     mavenCentral()
@@ -19,7 +30,6 @@ repositories {
 dependencies {
     testRuntimeOnly 'org.codehaus.groovy:groovy'
     testImplementation "org.spockframework:spock-core:$spockVersion"
-    testImplementation "org.spockframework:spock-spring:$spockVersion"
     testRuntimeOnly 'org.junit.vintage:junit-vintage-engine:5.5.0'
 }
 
@@ -44,11 +54,9 @@ artifacts {
 publishing {
     publications {
         maven(MavenPublication) {
-            groupId = 'io.github.team-xquare'
-            artifactId = 'utils'
-            version = '0.0.8'
-
-            from components.java
+            artifact("build/libs/lib-$version" + ".jar") {
+                extension 'jar'
+            }
         }
     }
     repositories {
diff --git a/lib/src/main/java/validator/StudentValidator.java b/lib/src/main/java/validator/StudentValidator.java
index afbe523..cb4e243 100644
--- a/lib/src/main/java/validator/StudentValidator.java
+++ b/lib/src/main/java/validator/StudentValidator.java
@@ -1,5 +1,6 @@
 package validator;
 
+import java.util.Arrays;
 import java.util.regex.Pattern;
 
 /**
@@ -16,4 +17,53 @@ public static boolean isEmailValid(String email) {
 
         return pattern.matcher(email).matches();
     }
+
+    /**
+     * @param gcn 학번
+     * @param type 학년
+     * @return true: 검증 성공, false: 검증 실패
+     */
+    public static boolean isGradeValid(Integer gcn, Integer type) {
+        int grade = gcn / 1000;
+
+        return type.equals(grade);
+    }
+
+    /**
+     * 학번으로 해당 학년이 맞는지 검사합니다.
+     * @param gcn 학번
+     * @param types 학년(복수 매개변수 가능)
+     * @return true: 검증 성공, false: 검증 실패
+    */
+    public static boolean isGradeValid(Integer gcn, Integer... types) {
+        int grade = gcn / 1000;
+
+        return Arrays.asList(types).contains(grade);
+    }
+
+    /**
+     * 학번으로 해당 학년이 맞는지 검사합니다.
+     * @param gcn 학번
+     * @param type 학년
+     * @return true: 검증 성공, false: 검증 실패
+     */
+    public static boolean isGradeValid(String gcn, Integer type) {
+        Pattern pattern = Pattern.compile("^[" + type + "]");
+
+        return pattern.matcher(gcn).matches();
+    }
+
+    /**
+     * 학번으로 해당 학년이 맞는지 검사합니다.
+     * @param gcn 학번
+     * @param types 학년(복수 매개변수 가능)
+     * @return true: 검증 성공, false: 검증 실패
+     */
+    public static boolean isGradeValid(String gcn, Integer... types) {
+        return Arrays.stream(types).anyMatch(type -> {
+            Pattern pattern = Pattern.compile("^[" + type + "]");
+
+            return pattern.matcher(gcn).matches();
+        });
+    }
 }