The development of planning and design of Taiwan public libraries evolved into unique features in the past 100 years. Different professionals, such as local masters, architectural engineers, architects, planning committee members, and professional construction management (PCM) have devoted to the planning and design work operations. Different operational methods, such as Use Occupancy Evaluation, Planning Documentation, and Participatory Planning were also developed for librarians to submit library functional knowledge to design professionals. In order to co-create a good library building, librarians and architects have communicated with each other to find a new direction to develop planning and design operations in the future.