In 2003, she entered the entertainment industry by starring in the same TV drama "Stairway to Heaven" as her actress sister Kim Tae-hee.

In 2004, she starred in the TV drama "Snow White" and won the Newcomer Award at the KBS Acting Awards.

In 2005, she starred in the TV drama "Let's Go to the Seaside".

In 2006, she starred in the TV drama "The Tree of Heaven" directed by Ko Kyung-hee.

In 2008, he starred in the war film "Don't Cry, Youth".

In 2009, she starred in the TV drama "Devouring the Sun".

Enlisted in the military from July 12, 2010 to April 23, 2012.

In 2013, she starred in the web drama "Because We Haven't Broken Up Yet" and returned to the TV screen.

On July 16, 2015, the film "Battle of Yeonpyeong" in which he starred was released for 23 days. The cumulative number of viewers exceeded 5 million, making it the first Korean domestic film to break the 5 million mark at the box office that year.

On June 18, 2017, Li Wan set off for Indonesia to participate in the shooting of SBS's "Law of the Jungle" program.

On June 7, 2019, the reality show "Mileage Soccer" in which she participated in the recording premiered in South Korea.

In 2021-2022, Li Wan starred in the films "Movie Street" and "Blood Is Thicker Than Water", which were successively released in South Korea.

On August 10, 2023, the TV drama "National Death Penalty Vote" in which she starred was aired.