diff --git a/documents/GDMS_DB_Design .txt b/documents/GDMS_DB_Design .txt
new file mode 100644
index 0000000..5cc8f24
--- /dev/null
+++ b/documents/GDMS_DB_Design .txt	
@@ -0,0 +1,135 @@
+id char 20
+password char 256
+name varchar 50
+e_mail_location varchar 50
+phonenumber varchar 30
+url varchar 256
+
+administrator
+    id
+    password
+    name
+    e_mail_location
+    phonenumber
+    
+
+profession_info
+    profession_code char 8
+    college varchar 256
+    department varchar 256
+    profession varchar 256
+
+student
+    id
+    password
+    name
+    e_mail_location
+    phonenumber
+    profession_code char 8
+    grade char 4
+
+teacher
+    id
+    password
+    name
+    e_mail_location
+    phonenumber
+    profession_code char 8
+    job_title varchar 256
+    education varchar 256
+
+
+graduation_design
+    id
+    student_id
+    teacher_id
+    chinese_name varchar 256
+    english_name varchar 256
+    type_of_topic char 3
+    source_of_design char 1
+    nature_of_design char 1
+    description_of_topic text
+    
+
+graduation_design_opening_report
+    id
+    opening_report_date date
+    opening_report_location varchar 256
+    opening_report_url 
+    opening_report_teacher_leader_team_id
+    opening_report_secretary_leader_team_id
+    estimated_word_count int
+
+graduation_design_opening_report_opinion_record
+    id
+    mentor_opinion text
+    mentor_opinion_date date
+    secretary_record text
+    secretary_record_date date
+    report_teacher_team_opinion text
+    report_teacher_team_opinion_date date
+    college_opinion text
+    college_opinion_date date
+
+opening_report_teacher_team
+    leader_teacher_id
+    teacher1_id
+    teacher2_id
+
+opening_report_secretary_team
+    leader_student_id
+    student1_id
+    student2_id
+
+graduation_design_finished_product
+    id
+    word_count int
+    final_date date
+    graduation_design_url
+    chinese_abstract text
+    chinese_key_words text
+    english_abstract text
+    english_key_words text
+
+
+graduation_design_finished_product_mentor_score
+    id
+
+graduation_design_finished_product_reviewer_score
+    id
+    score int
+    opinion text
+    reviewer_score_date date
+
+graduation_design_reply
+    id
+    reply_date date
+    reply_location varchar 256
+    reply_teacher_team_leader_id
+    reply_secretary_team_leader_id
+    
+graduation_design_reply_opinion_record_score
+    id
+    mentor_opinion text
+    mentor_opinion_date date
+    secretary_record text
+    secretary_record_date date
+    reply_teacher_team_opinion text
+    reply_teacher_team_score int
+    reply_teacher_team_opinion_date date
+    college_opinion text
+    college_score int
+    college_opinion_date date
+    school_opinion text
+    school_score int
+    school_opinion_date date
+
+reply_teacher_team
+    leader_teacher_id
+    teacher1_id
+    teacher2_id
+
+reply_secretary_team
+    leader_student_id
+    student1_id
+    student2_id
diff --git a/src/core/user/utils/AccountManagement.java b/src/core/user/utils/AccountManagement.java
index e9f934c..23b738d 100644
--- a/src/core/user/utils/AccountManagement.java
+++ b/src/core/user/utils/AccountManagement.java
@@ -10,6 +10,7 @@ import utils.Utils;
 import java.lang.reflect.InvocationTargetException;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.util.ArrayList;
 import java.util.List;
 
 public interface AccountManagement {
@@ -41,15 +42,24 @@ public interface AccountManagement {
         try {
             if(!rs.getString(2).equals(password))
                 throw new GExcptAccount("password wrong");
-            return createUser(userType,rs);
+            List<String> necessaryInfo = new ArrayList<>();
+            for(int i=0;i<4;i++){
+                necessaryInfo.add(rs.getString(i));
+            }
+            return createUser(userType,necessaryInfo);
         } catch (SQLException e) {
             e.printStackTrace();
         }
         return null;
     }
-    static User register(List<String> necessaryInfo, String User){
-        //todo
-        return null;
+    static User register(String userType, List<String> necessaryInfo) throws GExcptSQL {
+        String sql = "INSERT INTO "+userType+" VALUES(\'";
+        for(String info:necessaryInfo){
+            sql+=info+"\', \'";
+        }
+        sql =sql.substring(0,sql.length()-3)+")";
+        DBManagement.update(sql);
+        return createUser(userType, necessaryInfo);
     }
     static void logout(User user){
         //todo
@@ -59,7 +69,7 @@ public interface AccountManagement {
     }
     static User getUser(String userType){
         try {
-            return (Administrator)Class.forName("core.user."+ Utils.toUpperFristChar(userType)).getDeclaredConstructor().newInstance();
+            return (User) Class.forName("core.user."+ Utils.toUpperFristChar(userType)).getDeclaredConstructor().newInstance();
         } catch (InstantiationException e) {
             e.printStackTrace();
         } catch (IllegalAccessException e) {
@@ -73,16 +83,12 @@ public interface AccountManagement {
         }
         return null;
     }
-    static User createUser(String userType, ResultSet rs) {
+    static User createUser(String userType, List<String> necessaryInfo) {
         User user = getUser(userType);
-        try {
-            user.setId(rs.getString("id"));
-            user.setName(rs.getString("name"));
-            user.setE_mail_location(rs.getString("e_mail_location"));
-            user.setPhone_number(rs.getString("phone_number"));
-        } catch (SQLException e) {
-            e.printStackTrace();
-        }
+        user.setId(necessaryInfo.get(0));
+        user.setName(necessaryInfo.get(1));
+        user.setE_mail_location(necessaryInfo.get(2));
+        user.setPhone_number(necessaryInfo.get(3));
         return user;
     }
 }
diff --git a/src/init/Init.java b/src/init/Init.java
index 0e284b7..8654112 100644
--- a/src/init/Init.java
+++ b/src/init/Init.java
@@ -1,6 +1,8 @@
 package init;
 
+import core.user.utils.AccountManagement;
 import dao.DBManagement;
+import error.GExcptSQL;
 
 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
@@ -8,6 +10,8 @@ import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
 
 @WebServlet(name = "Init")
 public class Init extends HttpServlet {