As far as i know, you use Disk Utility
It's verify disk and repair disk. Permissions checking can't hurt, but it doesn't check for disk errors.
by the way when will be the time to verify our disk?
I don't think there's any set time or frequency that you should be verifying your disk. I tend to disk verify and check permissions if something doesn't work as usual or before an OS or other large software update. So, not very often at all, in other words.