Each year more and more festivals and events take place in Taiwan, and the scales of events are tending to become larger. However, due to the lack of economic impact evaluations for such tourism activities, the exact economic contributions of those events are unclear. The primary purpose of this research is to estimate the economic impacts for a ”mega-event”, the 1999 I-Lan International Children's Folk Art Festival. This study first utilizes a well-planed sampling design and visitor expenditure surveys to gather quality data to estimate visitor expenditures and economic influx. The second stage is to assess the various effects of economic impact by applying a modified input-output model. Lastly, some critical research issues and managerial implications are discussed.