① 不同角色登录：实现学生、教师和管理三种角色通过输入账号、密码以及匹配的验证码登录进入相应的用户页面。

② 个人信息维护：各角色用户可以查看自己的信息并对可编辑的信息进行修改维护操作；各角色用户可更改自己的登录的密码进行密码维护操作。

③ 公告管理：管理员发布新公告，并可对已发布公告进行修改、删除操作管理。

④ 教师出题：在毕业设计出题阶段，教师拟定课题供管理员审核通过后由学生选题。

⑤ 管理员审核课题：在毕业设计出题阶段，管理员查看待审核课题并对其进行审核操作。

⑥ 学生选题：在选题阶段，学生对已通过审核课题进行选题操作。

⑦ 教师对学生选题进行答复：在选题阶段，教师查看自己所出课题的选题情况，并予以答复，接受或拒绝。

-① different roles login: achieving students, teachers and administrators are three roles by entering the username, password and log into the code matches the corresponding user page. ② Personal Information Management: Users can view each character their own information and information that can be edited to modify maintenance operations　each character the user can change their password login password maintenance operations. ③ Notice Management: Administrators released a new announcement, and have been issued a notice to modify, delete operations management. ④ teacher topic: the topic in graduate design stage, teachers plan administrator through the audit issues for topics by students. ⑤ administrator audit topic: the topic in graduate design stage, the administrator to view the pending issues and to review its operations. ⑥ student topics: the topic phase, the students has been approved subject topics operation. ⑦ reply topic of teachers to students: the topic phase, teachers view them