Do you know if this mushroom is edible ?

Those are weird looking mushrooms. They made me think of wood ear mushrooms but not quite.  To ID mushrooms you almost always need to see the bottom.  Can you pull one and get another picture?

It doesn't have root. just a cup like grown out of soil.
If it is wood ears, is it edible?

I am not sure that they are wood ear. Don’t eat them unless someone can tell you for sure. I haven’t hunted for wood ear. This might help:
https://wildmushroomhunting.org/index.php?/topic/2232-wood-ear/

It is 100% not a wood ear Auricularia judae I don't think it'd even very closely related. If I were to make a best guess I would say perhaps Peziza succosa or something closely related, where you are in the world would help, as would some scale. Most of the options it could be are not edible but not poisonous either, but a couple are poisonous if not cooked and some are straight up poisonous. I cannot find anything edible in my book that looks like that, BUT I am in Europe so if you are in the USA or elsewhere I could be up totally the wrong tree.

Wood ear is called that because it grows on wood, not soil. So, definitely not that. Some random cup fungi. It doesn't have anything that makes it particularly distinct. It's not a bright color, and you haven't mentioned that it smells like anything special. Lacking those, I'd be wary of eating anything that was ID'd over the internet.  If you do a spore print and consult a few guide books, or may be able to find out what it is.