The purpose of this study was to explore the effect of activity involvement and knowledge on camping participations. There were 400 questionnaires distributed Kaohsiung and Tainan camping sites. Of a 92.5% response rate, there were 370 valid questionnaires obtained. This thesis utilized SPSS 23.0 for data analysis. Reliability and validity analysis, descriptive statistical analysis, Pearson's Correlation and multiple regression analysis employed for statistical analysis. Results revealed that both activity involvement and knowledge positively affect participation behaviors. Activity involvement has partially supported by attraction and life centration. This study improved our understanding of activity involvement and knowledge. It also offered suggestions to service providers to enhance their marketing performance.