How i will connect an LCD 16*2 on arduino uno?
I would assume, if you can not do a simple task such as googling "16x2 LCD Arduino", then actually hooking up the LCD itself is probably too much for you.
I am sorry to be harsh, but for cryin' out loud. "Arduino LCD" has got to be one of the most simple, straight-forward, always-brings-up-what-you-need, searches there could possibly be.
Effort. (Need some)