In March 2007 the Intellectual Property Case Adjudication Act was promulgated in Taiwan. This Act includes provisions about a secret protective order system, introduced from Japanese Patent Law primarily applied in civil cases, for protecting parties' trade secrets involved in litigation. Although the secret protective system is stipulated in Chapter Two of the Intellectual Property Case Adjudication Act for civil court proceedings, criminal court proceedings can also be applied mutatis mutandis in accordance with the same Act. In recent years, whether amendment on the Taiwanese Trade Secret Act or on the Japanese Unfair Competition Prevention Act, types and liabilities of crimes on trade secret offenses are reinforced and enlarged in compliance with the international trend of legislation. Nevertheless, issues may inevitably increase on as to how to ensure preventing further leakage of trade secrets during court proceedings when intellectual property cases are considered. In response, a special criminal court procedure is added in the Japanese Unfair Competition Prevention Act (in a specific Chapter, Articles 23 to 31). In view of the above, this paper targets primarily and values on as to ＂How criminal cases of Intellectual Property offenses in Taiwan should properly apply the secret protective order system?＂ and ＂Whether references should be made to the amendment of the Japanese Unfair Competition Prevention Act in adding a special criminal court procedure for trade secret offenses?＂ so as to re-establish a system o f trade secret protective order or the like suitable for court hearing on Intellectual Property criminal cases, and to realize a balance of trade secret protection, fair judgment assurance and implementation of judicial justice.