Abstract The main outline of this paper is divided into six chapters, as follows. Introduction of the first chapter, respectively, describe the motive of writing the purpose of research methods , the main terms and concepts related to a introduced. Chapter II, "the type of juvenile law and basic functional theory", first of all, mainly to clarify the function of model juvenile law and juvenile law related to the basis of a preliminary study to explore the rationale; followed, especially on Taiwan's 1997 amendments to the creation of juvenile law the "concentric circle theory" and the juvenile law system thinking interpretation of it. Chapter III "juvenile protection and international norms", is the first on juvenile protection and the formation of international norms slightly introduction, followed by the current international juvenile most countries signed the protection of international instruments "Convention on the Rights of the Child", "juvenile justice Standard Rules (the Beijing Rules) "," Protection of Juveniles Deprived of their Liberty Rules "and" guidelines for the Prevention of Juvenile Delinquency (Riyadh Guidelines), "notes one by one; Finally, in 2008 occurred in Taiwan's Kaohsiung port by juvenile probation girls shift supervisor incident Cases of view of international norms in our country to implement it or not. Chapter IV, "Taiwan and Japan's juvenile law amending the law History and Trends" to the two most recent content of amending the law (namely, in 2006 the draft amendment of Taiwan's juvenile law and juvenile law in 2000 to amend the content of Japan) for the scene, combined with the theory and practical view, discusses the trend of juvenile law. Chapter V "Taiwan and with Japan's juvenile law more", it has since juvenile law to distinguish between the two countries with the specific provisions of the same comparative study, although the former is the same provisions, but in different field of customs and people, the respective lead drawing a lot of practical life; the latter is looking forward to learning as the domain from the start, trying to inspire a new style of juvenile law. Finally, Chapter VI "Conclusions", in order for both theory and practice in this article, so on Taiwan's current practice of juvenile law to make a benign-depth criticism, as the experience of corroborative evidence, and of amending the law.