can we create add only permission level without view access to the list? I wanna the users to just add items without viewing it

You can't give users the add permission without also giving them the view permission. Its a required permission for add to work. Usually this kind of drop box is accomplished by creating a workflow or event reciever that automatically moves any item added to a seperate list where the user doesn't have permissions. That way the user can add items, but since they are immediately moved the user can't go back to view or edit the items later.Paul Stork SharePoint Server MVP

I agree with Paul an event receiver that sets the permissions on the list item. However, you can work around the issue by using Versions, requiring content approval, create a version each time you edit an item in this list, and under draft item security choosing only users who can approve items (and the author of the item). Then ensure your the folks you want to be able to view the list items have the approve items list permissions and the folks that should not be able to view the list items do not have approve items list permissions. Note: The users without the approve item list permissions will still be able to view their own list items.. -IvanIvan Sanders My LinkedIn Profile, My Blog, @iasanders.

Thanks guys, I found a custom actions in codeplex to use in workflows, these custom actions can edit item permission during workflow, http://spdactivities.codeplex.com/ so what I did is to change item permissions after upload and remove unwanted users, by use "Delete List Item Permission Assignment" and "Grant Permission on Item" Simple, easy, and recommend to try it!