Sang Eun Oh, who holds the ball board horizontally in his right hand, with two-sided anti-glue, loop ball and fast break, is also the only player in the Korean team who has reached the world-class level. He is fierce in playing, outstanding in height, large in platform area and high in forehand and backhand loop ball quality. Sang Eun Oh's forehand serve means are abundant, and his swing and picking skills are consistent, which is sudden and deceptive. Sang Eun Oh's backhand technique is unique, mainly hitting and hitting, which is one of his main scoring methods.

200 1 osaka beat kong of China 2-0 in the semi-final of the 46th world table tennis championships, dragging the game into the deciding game. In the end, the Korean team lost to China 2-3. In singles, Sang Eun Oh lost to Shi Lage with 1-3 in the 16th final, while in doubles, he won a bronze medal with Jin Zezhu.

In the individual event of the 47th World Table Tennis Championships in 2003, he lost to Kong in the men's singles eighth final and missed the quarterfinals. He lost to Wang Hao and Kong in the semi-final and won the bronze medal in doubles in the World Table Tennis Championships again. He and Li Enxi also reached the mixed doubles quarterfinals. Later, with the retirement of Kim Choe-soo, Sang Eun Oh gradually became the core player of the Korean team.

In the 2004 Qatar World Table Tennis Championships, Sang Eun Oh led the Korean team to win the third place in the men's team. At the World Table Tennis Championships in Shanghai the following year, Sang Eun Oh beat Sweden's Karlsson, advanced to the semi-finals, and finally won the third place in men's singles. In the 2006 World Table Tennis Championships in Bremen, Sang Eun Oh cooperated with Ryu Seung-min, Zhu Shihe and other teammates to enter the men's team final, which set the best result in the history of the Korean men's table tennis World Table Tennis Championships. In 2007 Zagreb World Table Tennis Championships, Sang Eun Oh lost to teammate Ryu Seung-min and failed to advance. Since then, Sang Eun Oh missed the 2008 World Table Tennis Championships due to injury.

At the Beijing Olympic Games, when Ryu Seung-min was in a bad state, Sang Eun Oh led the Korean team to win the third place in the men's team. In the singles competition, he eliminated German player Bohr, and finally lost to Marin in the 1/4 final, and missed the semi-final. The following year, at the World Table Tennis Championships in Yokohama, Sang Eun Oh was unexpectedly defeated by Japanese teenager Kentai Matsuhira and was out early. At the 20 10 World Table Tennis Championships, Sang Eun Oh entered the semi-finals with his teammates and finally won the third place in the men's team. At the 20 1 1 World Table Tennis Championships held in Rotterdam, Sang Eun Oh lost to Malone in singles 16. Sang Eun Oh won the bronze medal again in the team event of the 20 12 Dortmund World Table Tennis Championships.