The Enforcement Rules of the Prison Act Article 13

Prisoners shall be numbered following admission. A prisoner identity book shall be established with information of their names and places of origin.The identity book and the information of names and places of origin under the preceding paragraph may be prepared in writing, in the electronic version or in other proper manners.
中文原文 監獄行刑法施行細則第13條
受刑人入監後應編列號數,並編製身分簿及名籍資料。
前項身分簿及名籍資料得以書面、電子或其他適當方式為之。

English translation for reference only; the Chinese text prevails. Not legal advice.