As soon as you try to characterize any frequency band in terms of sheer distance, you're going to be wrong. There's too many variables. Free space path loss goes up with frequency, but for a given size, so does antenna gain, so in some circumstances, the antenna gains can increase faster than the path loss does.
To the OP, it's clear that English is not your native language. try to clarify you question so we can answer it better. In general, though, UHF bounces around easier than VHF, but absorption by trees and buildings is higher. What would work best for you is entirely dependent on what you're trying to accomplish.