I want to know what's the procedure to become a state level Cricket Umpire?
please explain starting from the grass root Steps.
You need to contact your local cricket authority - I think you can find them at http://www.orissacricket.org/
The normal procedure is to do a preliminary training course, and pass an exam, all on the laws of the game and practices of umpiring. Then you start umpiring in matches (lower-league adult games or childrens' games). If you're good enough, and prepared to put in the time and effort, you will progress through the ranks.
Good luck with it - umpiring is very enjoyable and a great way to be involved in the game at any level.