This compilation includes the contributions to the sixth German-Taiwanese on Public Law, which dealt with the principles of administrative law in terms of constitutional law. The 16 authors examine central aspects of administrative law both from the German and the Taiwanese perspective, using principles of the application of law, legal discretion, subjective-public rights, the principle of proportionality, the protection of confidence, the meaning of the basic rights in administrative procedures, thus highlighting parallels as well as differences. Initially, a fundamental lecture on the reform of constitutional procedural law in Taiwan, given by the present vice-president of the Judicial Yuan, is rendered. Altogether, we find here a well-balanced mixture of general dogmatic contributions and exemplary specific studies. In the respective sections, one German and one or two Taiwanese contributions are regularly being combined. In this way a comprehensive picture of the increasing constitutionalization of administrative law. With contributions by: Ai-er Chen, Hans Michael Heinig, Werner Heun, Tsong-li Hsu, Shu-perng Hwang, Jorn Ipsen, Chia-ho Lin, Ming-chiang Lin, Ming-hsin Lin, Sebastian Muller-Franken, Kyrill-Alexander Schwarz, Christian Starck, Hui-chieh Su, Yeon-chin Su, Nai-yi Sun, Yueh-sheng Weng