Park started the Short Track World Cup for the first time at the age of 15 and was able to achieve several outstanding results there straight away. She was particularly successful on the two shorter distances of 500 and 1000 meters; over 1000 meters she immediately won her first victory in her first World Cup race. In total, she managed five podium finishes in the 2007/08 season , including one victory, and she was fourth in the 500-meter World Cup and discipline World Cups over 1000 meters. Also with the relay she won a race at the last station. Despite her good World Cup results, she did not achieve such successful results in individual competitions at the 2008 World Championships in Gangneung , but she triumphed with the relay around Jung Eun-ju , Yang Shin-young and Kim Min-jung and thus became world champion.
In the Short Track World Cup 2008/09 , Park started with further top 10 placements, but did not succeed in a podium place in individual races for the time being. With the relay, however, she consistently took second place.
Note: This article places the family name before the person's first name. This is the usual order in Korean. Park is the family name here, Seung-hi is the first name.