My main instrument is guitar and I play blues. I want to find a music college which have guitar performance program! I am Korean
The two stand-out contemporary guitar performance programs off the top of my head would be Thornton at USC and Berklee. Not the only ones, by any means, but you didn’t give us much information to go on. Note that you’re going to have to show proficiency in playing more than just the blues when auditioning for top music programs.
UMass Lowell I believe. Do you play classical guitar at all? That would mean a different list of suggestions.
There’s also the contemporary music production program at University of Cincinnati College-Conservatory of Music