Sohyun began her idol career as a member of the child group Orange. The group debuted in 2005 with their first album We Are Orange. However, they disbanded shortly due to cyber-bullying and anti-fan internet cafes against the group.
2009: Debut with 4Minute
2016: 4Minute disbandment, new agency
On November 15, 935 Entertainment announced that Sohyun had signed on with the agency, where she would be focusing on activities as an actress.
2018–present: New agencies
On February 8, 2018, it was announced she had signed on with TheCNT.
On May 19, 2020, Management Allum announced that Sohyun had signed on with the agency.
She graduated from Pungmoon Girls' High School on February 7, 2013. She ranked 4th in her class.  For college, she attended Dongguk University where she was a student in the Theatre and Film Department.
- Love in Magic (2005) - cameo
- Hwanggu (2014)
- The Love That's Left (2017)
- Birthday (2019)
- Black Money (2019)
- A Little Princess (2019)
- Run Boy Run (2020)
- Jewel in the Palace (MBC, 2003) - cameo
- Jang Gil San (SBS, 2004) - cameo
- Lovers in Paris (SBS, 2004) - cameo
- Sweet Buns (MBC, 2005) - cameo
- High Kick Through The Roof (MBC, 2009) - cameo
- Criminal Minds (tvN, 2017) - cameo
- The Secret Life of My Secretary (SBS, 2019)
- Class of Lies (OCN, 2019)
- ↑ Soompi: 4Minute’s Sohyun Talks about How She First Debuted at 12 Years Old
- ↑ Soompi: Cube Entertainment Reps Say 4Minute Members Have Decided To Disband
- ↑ Soompi: Remaining 4Minute Members Say Goodbye To Cube Entertainment
- ↑ Soompi: Former 4Minute Member Kwon Sohyun Signs With Namgoong Min’s Agency
- ↑ Soompi: Kwon Sohyun Signs With Same Agency As Veteran Actors Na Moon Hee, Jun Kwang Ryul, And More
- ↑ Soompi: Former 4Minute Member Kwon So Hyun Signs With New Agency
- ↑ EN Korea: So Hyun of 4Minute Graduates From High School
- ↑ allkpop: Sohyun, Sunggyu, and Bang Yong Guk impress with their academic accomplishments on 'Infinity Challenge'
- ↑ Soompi: 4Minute’s Sohyun Accepted into Dongguk University