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That would reduce humidity, and temperature, and smell, I assume!
But can be a little tricky. Can't exactly cut a hole in the wall.
How would you do it?

Well i have a charcoal filter, and smell is taken care of. What i will do is cut a hole into the ceiling, and pump it into the crawl space.

Heheh, that could work! Does the crawl space have soffets/vents to allow air and moisture to escape to outside? That would be ideal I think. Just trickles out through little slats under the roofline.
Or maybe use one of those hoses and attachments for windows that come with AC units? Vent out a window as though you're venting regular AC exhaust.