The "Water Running Festival" is a characteristic culture of Ershui Township, Changhua County. It has a history of nearly 300 years. The waterway is held to commemorate the ancestors who opened up the town to fetch water. The traditional ceremony that has been handed down since the water was opened to the present, so that future generations can drink water and think of the source.The "Augmented Reality AR Bilingual Guide APP for Ershui International Water Running Festival" introduces augmented reality AR technology, connects local cultural attractions, puzzles, etc., and combines Chinese and English bilingual interface switching functions, allowing More international people know about Ershui and Water Running Festival activities, enhancing the connotation of sightseeing and historical inheritance.