Taiwan is rapidly becoming an aged society. Taiwan's public libraries and facilities must be transformed, by Universal Design concepts, to accommodate the aged, handicapped and varied people. Considerations of multiple users, problem-oriented design, and integration of different Universal Design principles are needed to reach in the spatial planning for Taiwan's public library. The thumb of rules are continual flat floor, adequate sharing zones, flexible supporting for the different disabilities, intuitive cognition in open space, error-tolerance interface of information service, low physical effort facilities and seats, and simple comfortable design with cultural meaning. To enhance the barrier-free environment to the caring for all, high-quality realm, Taiwan society shall continually enforce Universal Design concepts, and pay attention to the applications in different public facilities and developments of Universal Design products.