Hi Mahdi,
Please take a moment to review the documentation in the Manuals section. It would also be helpful for you to be
familiar with the SEBLOD storage methodology in this
tutorial
and videos.
Construction > Form & Content Type Manager
In your Content Type, you can define Access/Restriction (option #4) to define which fields are for an administrator or for a user.
Another method, is to use the List & Search Type to create a Content Manager as shown here:
Hope that helps,
Randy