He debuted as a member of EXO and its sub-unit EXO-M on April 9, 2012 with the group's first mini album Mama.
On October 31, 2016, Xiumin debuted as a member of the group's sub-unit EXO-CBX with the mini album Hey Mama!.
On May 7, 2019, Xiumin enlisted in the military as an active duty soldier. On November 23, 2020, SM Entertainment stated that Xiumin is in his final leave and will be discharged on December 6 without returning to the base. He was officially discharged on the same day.