How to live deploy your app using ionic cloud

how to live deploy your app using ionic cloud and connect it to your device and device check any update happen automatically from ionic cloud

The documentation is pretty clear on how to add this to your app. I do cover this in my book, Mobile App Development with Ionic 2 from O’Reilly.

i do all things and upload app to ionic cloud but i confused about how to connect mobile device to ionic cloud to sense the latest update in the app

As Chris said, the documentation is quite clear:
Documentation - Ionic Documentation