diff --git a/tomcat/src/main/java/org/apache/coyote/controller/RegisterController.java b/tomcat/src/main/java/org/apache/coyote/controller/RegisterController.java
index f00da75f03..587882291e 100644
--- a/tomcat/src/main/java/org/apache/coyote/controller/RegisterController.java
+++ b/tomcat/src/main/java/org/apache/coyote/controller/RegisterController.java
@@ -4,6 +4,7 @@
 import static org.apache.coyote.http11.HttpStatus.OK;
 
 import java.util.Map;
+import java.util.Objects;
 import nextstep.jwp.db.InMemoryUserRepository;
 import nextstep.jwp.model.User;
 import org.apache.coyote.http11.HttpRequest;
@@ -14,17 +15,30 @@
 
 public class RegisterController extends AbstractController {
     private static final Logger log = LoggerFactory.getLogger(RegisterController.class);
+    public static final int LOGIN_QUERY_PARAMS = 3;
 
     @Override
-    protected void doPost(HttpRequest request, HttpResponse response) throws Exception {
+    protected void doPost(HttpRequest request, HttpResponse response) {
         Map<String, String> queryParms = Utils.parseToQueryParms(request.getBody());
+
+        validateQueryParms(queryParms);
         User user = new User(queryParms.get("account"), queryParms.get("password"),
                 queryParms.get("email"));
+
         InMemoryUserRepository.save(user);
         response.setStatus(FOUND);
         response.setRedirectUrl("/index.html");
     }
 
+    private void validateQueryParms(Map<String, String> queryParms) {
+        long count = queryParms.entrySet().stream()
+                .filter(entry -> Objects.nonNull(entry.getValue()))
+                .count();
+        if (count != LOGIN_QUERY_PARAMS) {
+            throw new IllegalArgumentException();
+        }
+    }
+
     @Override
     protected void doGet(HttpRequest request, HttpResponse response) throws Exception {
         response.setStatus(OK);