I very much thank to K.Mohan sir and DR.N.V. Srinivasa Rao sir foe their quick responses.
As from the detailed explanation of K. Mohan sir, I know that correct meaning of "Eid Mubarak" and also we can use another greeting word that is "Eid Saeed" .
Since we have follow the meaning :
Eid Mubarak -have a blessed festival
Eid Saeed-Happy Eid(festival).
"Every day is a gift"