Qt doesn't provide a deployment packaging tool for Windows so you have to use a third party tool. I have listed a couple of the commonly used ones. How you use them is a matter for their manuals and tutorials. In short:
  • Build and test your Qt project
  • Work out what you need to deploy: Deploying Qt Applications
  • Write a script for your installer generator of choice
  • Run your installer generator of choice to build your installer.
  • Profit