In the mid 1990s, Applied Theatre emerged from various theatrical form in England and America. Especially, Applied Theatre was founded out of Theatre such as school, church, prison, hospital, classroom, and so on. However, there is few discourse what is it exactly and how it works. In first chapter, I will make examples several production from different Theatre group as a sample of the Applied Theatre in contemporary Korea. These six different types of Applied Theatre-such as TIE(Theatre in Education), prison theatre, community-based theatre, theatre for development, theatre for health education, social theatre- propose some characters of the Applied theatre. Next chapter addresses a brief historical and theoretical overview of the Applied Theatre and provide a general concept of Applied Theatre. Applied Theatre is a `umbrellal term` which embraces diverse categories of theatrical form. Their commonly determining character as Applied Theatre are `participation` and `transformation`. Then, I will campare the situation if Korean dicourse of the Applied Theatre. Comparing characters of traditional art with participatory art, In the final chapter, I will place Applied Theatre as a participatory art which is socially engaged. Especially, I will focus on some qualities of the Applied Theatre as a `social tern` : liminality, marginality, intervention This process-centered work of collaboration has something beyond in the form itself. Applied Theatre has a intentional strong power as a social transtormation.