This paper draws upon labeling theory, differential association theory, and the general theory of crime. It seeks to illustrate how the legislative intent of the Juvenile Proceedings Act prioritizes the teenager's protection, serves and protects teenagers who commit minor crimes through social services, and prevents negative labeling and reduces the possibility of committing crime again. So, in order to protect teenage first-time offenders the basic outline of the regulations contain various kinds of social welfare approach in trial procedure and protective treatment. However, in carrying out this welfare approach, the regulations and system present real difficulties and problems persist. Therefore, the legislation protecting the teenage criminal is still unable to fully realize it's potential. Given these problems, this study proposes that we need to improve the system through revising the law in order to fulfill the legislative purpose of juvenile protection work.