Collective management of patient records enhances the ability to identify disease and supporting treatment decisions. We propose a Web-based system for the collective management of medical information for stroke patients. Our system collects data about acute stroke patients, allows physicians to collaborate over the Internet, simplifies physician reporting, improves the management of results from various evaluation steps, and supports treatment decisions. By providing timely guidance on rapid evaluation and treatment of time-dependent diseases such as acute stroke, which need fast and consistent communication between medical service providers, our system can improve patient outcomes.