Question: I know this is not a technical related question.But i do not have any idea.I am going to develop a project which should be supported in both phone and tablet.Is it possible having one project working for both tablet and phone ?

Answer: 
I have seen Access database have real poor security and which is terribly slow. If at all you intend to open your access database after a few days of running in production, you will see the how slow it can be. 

Though it looks like you are new to MySQL, you will not need much of a learning curve to work with it. MySQL have lot of users that you will get a good support for you MySQL related questions also. And the best of all you will be able to learn MySQL, which i am sure you will use later for other applications you create.
If you are the one that has to maintain the application also in future then drop the idea of Access and change into MySQL.
Access is only for personal use (or maybe with some small number of co-users)