The 38-year-old, a two-time AFC Champions League™ winner with Ulsan Hyundai, will finish his career once Daegu have completed their league commitments on December 3.
Lee was named the AFC Player of the Year in 2012, when he was instrumental in Ulsan’s continental success, scoring four times in 12 AFC Champions League appearances including in both legs of the semi-final against Uzbekistan’s Bunyodkor.
He had joined the club earlier that year after spells with Incheon United and Daegu as well as J1 League sides Jubilo Iwata and Gamba Osaka having made his debut for Korea Republic in 2007 in a friendly against Iraq.