The South Korea international has penned a three-and-a-half year deal at Loftus Road after being granted a work permit and will be eligible to play for the Hoops once he obtains a visa.
The 22-year-old left-back made his full South Korea debut last October in a Fifa World Cup qualifier against Iran before featuring in their Olympic side which won bronze at the London Games.
Suk-Young has also been named in the South Korea squad that take on Croatia in a friendly at Craven Cottage next month, with QPR fighting off interest from a number of top European clubs for his signature.
He joins compatriot Park Ji-Sung, who retired from international football in 2011, at Loftus Road after the midfielder joined the Hoops from Manchester United in the summer.
ENHANCED ODDS: Get 8/1 on Arsenal to beat Man Utd - or 16/1 on Man Utd