What is asbestos cement sheet?
Call a professional.  

I'm not sure there are really any diy ways to handle asbestos.  In most places you need a license, and lots of expensive equipment to remove asbestos.  You might be able to find somebody in your area willing to come out and take a look for free, if you are really lucky and they are really nice (or really hard up for work) they might even test it for free.  The removal will most likely be a bit costly though.