| 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 |
|