| No. | Result | Record | Opponent | Type | Round, time | Date | Location | Notes |
|---|
| 23 | Loss | 20–3 | Pichit Sithbanprachan | TKO | 1 (12), 1:02 | Jul 11, 1993 | Provincial Stadium, Nakhon Sawan, Thailand | For IBF flyweight title |
| 22 | Loss | 20–2 | Ricardo López | UD | 12 | Dec 21, 1991 | Incheon Gymnasium, Incheon, South Korea | For WBC mini-flyweight title |
| 21 | Win | 20–1 | Aswin Sithlakmuang | PTS | 10 | Aug 6, 1991 | Munhwa Gymnasium, Seoul, South Korea | |
| 20 | Win | 19–1 | Vin Chuvanta | KO | 1 (10), 0:34 | Oct 20, 1990 | Hanyang University Stadium, Seoul, South Korea | |
| 19 | Win | 18–1 | Chris Galon | UD | 10 | Jun 16, 1990 | Jongha Gymnasium, Ulsan, South Korea | |
| 18 | Win | 17–1 | Nikki Maca | TD | 8 (10), 1:25 | Apr 15, 1990 | Green Pier Hotel, Suwon, South Korea | |
| 17 | Win | 16–1 | Nikki Maca | PTS | 10 | Dec 29, 1989 | Bucheon, South Korea | |
| 16 | Win | 15–1 | Hi-Hwan Moon | KO | 4 (6), 3:00 | Oct 3, 1989 | Seoul, South Korea | |
| 15 | Win | 14–1 | Sang Sik Chang | KO | 2 (10), 3:00 | Oct 29, 1988 | City Hall Square, Ansan, South Korea | |
| 14 | Win | 13–1 | Hi Chung Noh | UD | 10 | Jul 24, 1988 | Pohang Gymnasium, Pohang, South Korea | |
| 13 | Win | 12–1 | Nico Thomas | KO | 4 (10), 0:59 | Apr 30, 1988 | Ulsan Gymnasium, Ulsan, South Korea | |
| 12 | Loss | 11–1 | Hiroki Ioka | TKO | 12 (12), 1:36 | Jan 31, 1988 | Osaka-Jo Hall, Osaka, Japan | For WBC mini-flyweight title |
| 11 | Win | 11–0 | Masaharu Kawakami | KO | 2 (15), 0:31 | Jun 14, 1987 | Hawaii Hotel, Bugok, South Korea | Won inaugural IBF mini-flyweight title |
| 10 | Win | 10–0 | Byung Nam Park | KO | 1 (10), 2:53 | Mar 14, 1987 | Chuncheon Gymnasium, Chuncheon, South Korea | |
| 9 | Win | 9–0 | Sung Kyu Kim | PTS | 8 | Nov 16, 1986 | Girls' Commercial School, Gunsan, South Korea | |
| 8 | Win | 8–0 | Byung-Shik Bae | PTS | 8 | Aug 3, 1986 | Munhwa Gymnasium, Seoul, South Korea | |
| 7 | Win | 7–0 | No Sung Choi | PTS | 6 | Jun 29, 1986 | Munhwa Gymnasium, Seoul, South Korea | |
| 6 | Win | 6–0 | Il Hwan Kim | KO | 5 (8), 2:30 | May 31, 1986 | Bucheon, South Korea | |
| 5 | Win | 5–0 | Dong Pil Yang | PTS | 6 | Jan 12, 1986 | Munhwa Gymnasium, Seoul, South Korea | |
| 4 | Win | 4–0 | Hi Chung Noh | PTS | 6 | Dec 10, 1985 | Munhwa Gymnasium, Seoul, South Korea | |
| 3 | Win | 3–0 | Jung Ho Kang | PTS | 4 | Dec 8, 1985 | Munhwa Gymnasium, Seoul, South Korea | |
| 2 | Win | 2–0 | Jae Hak Chun | PTS | 4 | Dec 5, 1985 | Munhwa Gymnasium, Seoul, South Korea | |
| 1 | Win | 1–0 | Young Jae Chung | KO | 3 (4), 0:39 | Dec 4, 1985 | Munhwa Gymnasium, Seoul, South Korea | |
