Hi Tisha, and welcome to garden.org. Um, what exactly is wrong with your rose bushes that makes you want to take this drastic action? A picture of them and the area would help a lot.
How old are these rose bushes? If they are growing adjacent to trees that have roots invading the rose area then yes, re-planting them in tubs and sinking the tubs might help, but another problem with planting roses near trees is that the trees will also shade the roses at some point, and full sun is definitely a part of a successful rose garden.
You also will want to wait until your roses go pretty much dormant in the fall before rousting them out of where they are, I think.
But please! First tell us the history and problems you're seeing.
