[1] She represented her nation South Korea at the 2008 Summer Olympics, and has won a bronze medal, as a member of the women's 4 × 200 m freestyle relay team, at the 2006 Asian Games in Doha, Qatar.

[2][3] Lee competed for the South Korean swimming team in the women's 200 m freestyle at the 2008 Summer Olympics in Beijing.

[4] She finished with a thirty-first place time of 2:02.61 to earn her selection to the South Korea's Olympic team at the World Championships one year earlier in Melbourne, Australia, clearing the FINA B-cut (2:03.50) by almost a full second.

[5][6] Coming from seventh at the 150-metre lap in heat two, Lee held off a sprint challenge from Ireland's Melanie Nocher towards the final stretch, but could not catch her near the wall by over a full-body length to finish in dead-last with a disappointing 2:05.71.

Lee failed to advance into the semifinals, as she placed forty-sixth overall in the prelims.