I wanna have a picture like this
but What can I do if I do it by myself ?
You can, with a tripod, remote control shutter release and a good knowledge of photography.
However there is so much involved in getting a picture like that (making sure the hair is right, the dress falls as it should be, lighting, shadows,...) that I personally think you need someone to operate the camera in order to get a good result. But nothing can stop you from trying if you want to.
Even as a pro, I would not attempt this shot by myself. I would ask a friend to help you.
There are very few good cameras with wireless remotes so you would have to rely on self timer. Most cameras have only a 10 second self timer and even without water, that would be a very little amount of time to get yourself in frame and positioned gracefully - without slipping or falling in the water. Be careful! Get help from a friend!