The announcement of Judges Act in 2011 marks a mile stone in judges’ rights, obligations, and supervising mechanism. One of the high-profile issues that derived from Judges Act is how to seek balance between judge independency and supervision of duties, which is not an easy task, since overly intense supervision would undermine judge independency, but inadequate supervision would also impair the right of instituting legal proceedings guaranteed to the people due to misconduct of judges. The primary contents of supervision of duties regulated in Article 19 to 21 of Judges Act include principles of supervision of duties, individuals having the supervision authority, measures, and channel to seek remedy. The “supervision of duties” defined in Judges Act includes prohibiting a judge from committing illegal conduct while carrying out duties, correcting a judge's improper speech or conduct, and prompting a judge to expedite the execution of duties in accordance with the law. However, other important supervision measures taken in practice, such as evaluation on a judge’s performance and duty transfer, seems to be excluded from supervision of duties according to Judges Act. This is clearly an issue that needs further discussion. Hence, supervision of duties mentioned in this article includes: transfer disposition, warning disposition, suspension disposition, discipline disposition, case evaluating resolution, and disposition to declare resolution of allocation of judicial affairs made by Council of Judges illegal. This article will discuss how supervision of duties affects judge independency, review legal opinions of the Court of Judiciary, raise several legal issues, and put forward few legal opinions that are different from judicial practice. Lastly, this article will compare “core theory” and “exterior order theory” in Germany Judges Act to “core extent theory” mentioned by the Court of Judiciary in Taiwan, which leads to the conclusion that in order to ensure judge independency demanded by the Constitution, the stipulations regarding to supervision of duties in Judges Act should be amended, and a systematic review on the legal opinions of the Court of Judiciary is urgently required.