She has attended Changduk Girls' High School and Sangmyung University.

[5] She then started acting and starred in A Sea of Her Own, for which she was nominated for Excellence Award, Actress in a Daily Drama in 2017.

She also starred in Grand Prince as a supporting role, for which she was praised by fans.

[citation needed] In 2018 she played a protagonist villain role in Secrets and Lies for which she won the Best Actress award.

[9] In 2022, Oh returned to the small screen again as Kang Ba-da, the ruthless chaebol of Le Blanc and the lead villain of Vengeance of the Bride.