How do I wire a thermostat to turn on a blower that is 220 volt

What sort of thermostat are you using... and what is its rated voltage? Wet or dry contacts? (meaning do they supply any power or not) How big is the blower.

You will typically do this via a relay or contactor, controlled by the thermostat.

I agree with smoothy. You need to provide us with more info. Tell us what you are trying to achieve so we can be more helpful.