The 200,000th visitor to the Taiwan Pavilion received a laptop on Wednesday afternoon.
The 199,999th and 200,001st visitors got LCD screens as gifts.
Performances were staged to celebrate the occasion.
Chih Kang Wang, chairman of the Taipei World Trade Center, attended the ceremony.
The pavilion receives 4,000 visitors a day.
The pavilion design is a transparent cube housing a giant ball in its centre. It is mainly made of steel and glass, the skylines of the island's Mount Morrison and Mount Ali painted on the facade. The main part of the pavilion was built with stone from Jade Mountain and soil from Yin-Ko Town.
Taiwan invites visitors to set off lanterns for blessing - a Taiwan island custom - and view its beautiful mountains and lakes at its pavilion. The pavilion showcases the island's scenery, its kind-hearted people and culture under the theme "Mountain, Water, Heart and Lantern."