She launched her career by starring in two classic film and television series franchises, Whispering Corridors and School.

Choi Kang-hee made her acting debut in 1995 with a high school drama The New Generation Report: Adults Don't Know.

[3] She then went on to appear in the first installment of famed film and series franchises, horror film Whispering Corridors (1998) and television series School (1999), followed by Sweet Buns (2004) and Our Stance on How to Treat a Break-up (also known as Rules of Love, 2005).

[4][5] In 2006, Choi starred in the low-budget black/romantic comedy film My Scary Girl, which became a critically-praised sleeper hit.

[29][30] In October 2006, Choi was awarded a silver medal by the Korea National Red Cross in recognition of her frequent blood donations.