diff --git a/db/app_uoj233.sql b/db/app_uoj233.sql
index 482b34f..5e53a20 100644
--- a/db/app_uoj233.sql
+++ b/db/app_uoj233.sql
@@ -450,6 +450,7 @@ UNLOCK TABLES;
 CREATE TABLE `problems` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
   `title` text NOT NULL,
+  `uploader` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
   `is_hidden` tinyint(1) NOT NULL DEFAULT '0',
   `submission_requirement` text,
   `hackable` tinyint(1) NOT NULL DEFAULT '0',
@@ -618,6 +619,7 @@ CREATE TABLE `user_info` (
   `usergroup` char(1) NOT NULL DEFAULT 'U',
   `username` varchar(20) COLLATE utf8mb4_unicode_ci NOT NULL,
   `realname` varchar(30) COLLATE utf8mb4_unicode_ci NOT NULL DEFAULT '',
+  `usertype` varchar(50) NOT NULL DEFAULT 'student',
   `email` varchar(50) NOT NULL,
   `password` char(32) NOT NULL,
   `svn_password` char(10) NOT NULL,
diff --git a/web/app/controllers/problem_set.php b/web/app/controllers/problem_set.php
index f74875b..a301f56 100644
--- a/web/app/controllers/problem_set.php
+++ b/web/app/controllers/problem_set.php
@@ -7,10 +7,10 @@
 		becomeMsgPage(UOJLocale::get('need login'));
 	}
 	
-	if (isSuperUser($myUser)) {
+	if (isSuperUser($myUser) || isProblemManager($myUser) || isProblemUploader($myUser)) {
 		$new_problem_form = new UOJForm('new_problem');
 		$new_problem_form->handle = function() {
-			DB::query("insert into problems (title, is_hidden, submission_requirement) values ('New Problem', 1, '{}')");
+			DB::query("insert into problems (title, uploader, is_hidden, submission_requirement) values ('New Problem', '{$myUser['username']}', 1, '{}')");
 			$id = DB::insert_id();
 			DB::query("insert into problems_contents (id, statement, statement_md) values ($id, '', '')");
 			dataNewProblem($id);
@@ -189,7 +189,7 @@ $('#input-show_submit_mode').click(function() {
 	echo '</table>';
 	echo '</div>';
 	
-	if (isSuperUser($myUser)) {
+	if (isSuperUser($myUser) || isProblemManager($myUser) || isProblemUploader($myUser)) {
 		$new_problem_form->printHTML();
 	}
 	
diff --git a/web/app/controllers/super_manage.php b/web/app/controllers/super_manage.php
index 9805922..6a508f8 100644
--- a/web/app/controllers/super_manage.php
+++ b/web/app/controllers/super_manage.php
@@ -122,6 +122,8 @@
 	$options = array(
 		'banneduser' => '设为封禁用户',
 		'normaluser' => '设为普通用户',
+		'problem_uploader' => '设为题目上传者',
+		'problem_manager' => '设为题目管理员',
 		'superuser' => '设为超级用户'
 	);
 	$user_form->addSelect('op_type', $options, '操作类型', '');
@@ -132,9 +134,19 @@
 		switch ($_POST['op_type']) {
 			case 'banneduser':
 				DB::update("update user_info set usergroup = 'B' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'banned' where username = '{$username}'");
 				break;
 			case 'normaluser':
 				DB::update("update user_info set usergroup = 'U' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'student' where username = '{$username}'");
+				break;
+			case 'problem_uploader':
+				DB::update("update user_info set usergroup = 'U' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'problem_uploader' where username = '{$username}'");
+				break;
+			case 'problem_manager':
+				DB::update("update user_info set usergroup = 'U' where username = '{$username}'");
+				DB::update("update user_info set usertype = 'problem_manager' where username = '{$username}'");
 				break;
 			case 'superuser':
 				DB::update("update user_info set usergroup = 'S' where username = '{$username}'");
diff --git a/web/app/libs/uoj-query-lib.php b/web/app/libs/uoj-query-lib.php
index 4907ba1..ddc8462 100644
--- a/web/app/libs/uoj-query-lib.php
+++ b/web/app/libs/uoj-query-lib.php
@@ -4,20 +4,23 @@ function hasProblemPermission($user, $problem) {
 	if ($user == null) {
 		return false;
 	}
-	if (isSuperUser($user)) {
+	if (isSuperUser($user) || isProblemManager($user)) {
+		return true;
+	}
+	if ($problem['uploader'] == $user['username']) {
 		return true;
 	}
 	return DB::selectFirst("select * from problems_permissions where username = '{$user['username']}' and problem_id = {$problem['id']}") != null;
 }
-function hasViewPermission($str,$user,$problem,$submission) {
-	if ($str=='ALL') {
+function hasViewPermission($str, $user, $problem, $submission) {
+	if ($str == 'ALL') {
 		return true;
 	}
-	if ($str=='ALL_AFTER_AC') {
+	if ($str == 'ALL_AFTER_AC') {
 		return hasAC($user,$problem);
 	}
-	if ($str=='SELF') {
-		return $submission['submitter']==$user['username'];
+	if ($str == 'SELF') {
+		return $submission['submitter'] == $user['username'];
 	}
 	return false;
 }
@@ -178,4 +181,4 @@ function deleteBlog($id) {
 	DB::delete("delete from blogs_comments where blog_id = $id");
 	DB::delete("delete from important_blogs where blog_id = $id");
 	DB::delete("delete from blogs_tags where blog_id = $id");
-}
\ No newline at end of file
+}
diff --git a/web/app/libs/uoj-utility-lib.php b/web/app/libs/uoj-utility-lib.php
index 675d310..6fecced 100644
--- a/web/app/libs/uoj-utility-lib.php
+++ b/web/app/libs/uoj-utility-lib.php
@@ -129,6 +129,13 @@ function blog_name_decode($name) {
 	return $name;
 }
 
+function isProblemUploader($user) {
+	return $user != null && $user['usertype'] == 'problem_uploader';
+}
+function isProblemManager($user) {
+	return $user != null && $user['usertype'] == 'problem_manager';
+}
+
 function isSuperUser($user) {
 	return $user != null && $user['usergroup'] == 'S';
 }