See fn_listextendedproperty system function in BOL

SELECT   *
FROM   ::fn_listextendedproperty ('MS_Description', 'user', 'dbo', 'table', 'T1', 'column', default)

>>SELECT * FROM pubs.INFORMATION_SCHEMA.Columns
>*--------------------------------------------------------
>Dear Sergey,
> Thanks for reply.Maybe I should make what i want more clear.
>If you design a table with the Table Designer,you will find there is
>a Description property for a Column on the top line of lower panel,i
>mean where the property value is restored in some one system table.
>Looking forward to your further help. ;)