Bolton seal South Korean signing from Seoul
Lee, 21, who has scored two goals in 16 appearances for his country, becomes Bolton's fifth signing of the transfer window after agreeing a three-year-deal.
"Lee is another good addition to our squad," manager Gary Megson told the club's website.
"He has got pace and ability and it is great that we have finally been able to get him."
Lee is available for Bolton's opening match of the season at home to Sunderland on Saturday.