The stadium underwent a series of refurbishment during 1970's, and the light poles were added in 1992, enabled the stadium for night time uses; however, because the stadium is located under the flight path of commercial airliners in and out of Tainan Airport, the height of light poles was limited and so the light poles are placed on the spectators seatings, obscuring the view of certain seats and also make the ball hard to see for outfielders when looking for outfield fly balls.

In 1995, the second level of the outfield spectators seatings and elevators were added, making Tainan Stadium the first stadium in Taiwan to have more than one level and expanded the capacity to 14,500. The dimensions of the stadium were extended in 2003 from 380 ft to 400 ft in the center field and respectively all around the outfield, after it has failed to qualify for use of Baseball World Cup in 2001. The LED screen was also installed in late 2003, just in time for the World University Baseball Championship which was held in 2004. The latest refurbishment was done in 2005, when the infield seatings were changed to a more comfortable model; the Lions organization hoped it would make the experience of the spectators in the stadium more enjoyable, and thus would attend the game more often. This latest refurbishment also reduced the stadium capacity to 12,500.

The stadium is currently under the management of Uni-President Lions organization since 1999, although the ownership is retained by the Tainan City Government.

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