The purpose of this study is to investigate the factors on the characteristics of youth gambling addiction to develop the youth gambling prevention program. The data was collected by using questionnaire, from Oct 2010 to Dec 2011. Of the 2,400 surveys distributed, 2,301 were collected and 2,286 of those were used for analysis after eliminating 15 with insufficient responses. The major findings of this study can be summarized as follows. First, there were some differences on the future gambling intention and the internet addiction by gender, grade, pocket money, experience in the illegal gambling site visits and gambling experience. Students who experience in the illegal gambling site visits were represented relatively higher on the future gambling intention and the internet addiction. Second, the overall experience in the illegal gambling site visits is 6.9%, while 23.2% of the total respondents were found to be the experience of gambling. Third, the future gambling intention, irrational gambling beliefs and the internet addiction were found have positive correlation with each other.