Alibang Eco-Farm is situated in the low-altitude region of the Datun Volcano Group in northern Taiwan, renowned for its rich wetland resources and diverse aquatic insect population. This study offers an overview of the aquatic insect fauna discovered in Alibang Eco-Farm and the nearby Alibang Stream. Species data were gathered through long-term Odonata monitoring spanning from 2003 to 2023, as well as a water insect survey conducted in 2023. The findings revealed a total of 136 species belonging to 45 families and 7 orders. Notably, this study marks the first recorded instance of Peltochares atropiceus Régimbart, 1903, a species of water scavenger beetle, on the island of Taiwan.