It is challenging for schools to manage collections of digitised resources for different subjects in different academic levels. It is not uncommon for a school to have thousands of pages of stored content, including books, magazines, teaching materials, students' works, administration documents and examination papers. Often these files are stored in many different places and in a way that is not well organised and sometimes teachers may encounter difficulties while retrieving documents. Therefore schools can implement a knowledge repository and design taxonomy for centralising the storage and categorising of school's contents respectively in order to enhance the aforesaid current situation. This dissertation paper presents a case study at a secondary school in Hong Kong. This case study examined the effect of the implementation of a new knowledge repository system as the school has already had some existing storage devices for storing the contents. Also, we studied the factors that affected the implementation of a designed taxonomy on which it helps categorise the digitised documents stored in the knowledge repository at the school. To conduct the project, a pilot team from four Departments was formed at the school. A new knowledge repository system was selected to store and manage digitised resources at the school. Also, a taxonomy was defined with a standard structure suitable for each Department to restructure its existing file folders in computer servers. Evaluations were made through conducting surveys regarding the users' behaviour and system performance, and interviewing with the Heads of the four Departments.