Taiwan passed comprehensive amendments to the Prison Act and the Detention Act in the end of 2019. The new Prison Act and Detention Act were promulgated on January 15, 2020, and came into effect on July 15 of the same year. A key reform in this amendment to the Prison Act and Detention Act concerns the implementation of the principle of transparency and protection the rights of inmates as stipulated in Article 7 of the Prison Act and Article 5 of the Detention Act that all correctional facilities should establish independent external inspection committees (hereinafter referred to as“external correctional facility inspection committees”). The legislative rationale for Taiwan’s external correctional facility inspection committees drew inspirations from Japan’s“Criminal Facilities Inspection Committee”system (Article 7 et seq. of Japan’s Act on Penal Facilities and the Treatment of Inmates, etc.) and Germany’s“Prison Advisory Committee”system (Article 162 et seq. of Germany’s Federal Prison Act). This article will research Japan’s“Criminal Facilities Inspection Committee”system and Germany’s“Prison Advisory Committee”system. Additionally, regarding the external independent oversight mechanisms for places of detention in the UK, the primary body is“Her Majesty’s Inspectorate of Prisons”(HMIP). Since the practice of external oversight mechanisms for places of detention in the UK is internationally renowned, this article will also examine the UK system. After exploring foreign legal systems, this article will further explicate the system and practical operations of Taiwan’s“external correctional facility inspection committees”and compare them with systems in other countries. Regarding the practical operation of Taiwan’s“external correctional facility inspection committees,”this article will, based on the author’s own observations, illustrate the operational problems of the external correctional facility inspection committees and the operational status of inmates’complaints to the external inspection committees. Finally, based on the research of foreign legal systems and observations of Taiwan’s legal system and its operations, this article proposes four recommendations for Taiwan’s“external correctional facility inspection committees”in the conclusion: 1. The selection mechanism for members of the external correctional facility inspection committees should be modified to include non-expert scholars; 2. Provide professional training courses for external inspection committee members; 3. Establish an effective inspection model; 4. Clarify the positioning of the external inspection committees regarding inmate complaints and the operation of complaint handling.