Road Bike or Hybrid Bike For Paving Stone I haven't got any experience for these bikes. I want to buy a bike but I can't decide because I will use on paving stone. For example here.

I'd like to buy a hybrid bike however I saw this
bike in Decathlon and I fell in love with it. This situation confuses me. Which bike type should I buy ? Hybrid or road bike ? Will I have a problem by road bike on paving stone ?
Those paving stones look fine - you could take just about any bike along them.  it's worth considering that there are bike races on far worse pavements - the Paris Roubaix famously.

So you don't need to worry about that.  I would say that the bike you linked to in Decathlon is also a hybrid - it's not a 'road bike' in the traditional sense, which would imply drop handlebars, more like this one:  http://www.decathlon.co.uk/triban-3-road-bike-white-id_8239800.html

(I have no idea what that bike's like - it's just the first one which came up)

As to which one you would buy.. well try them out, see which styles you prefer.