It is usually played in late October or early November, after the regular season.
It was formerly known as the CPBL Seasonal Championship Series (Chinese: 中華職棒年度總冠軍賽), and was renamed the Taiwan Series after the merger of the CPBL and the Taiwan Major League in 2003.
The two half-season winners are automatically the number one and two seeds; the one with the better full-season record gains an automatic berth into the best-of-seven Taiwan Series, played in a 2-2-3 format.
If the same team wins both halves, the next two teams with the best full-season record play in the first round; the winner plays in the Taiwan Series, with the team that wins both halves having a 2-2-2 format, as they start the Taiwan Series with one-win advantage.
Before 2000, if a team managed to win the both half seasons, then they were directly crowned as the champion, and the Taiwan Series was not held.