Discharge summary note is one of important clinical data in medical records, and it concisely summarizes the patient's stay during hospitalization. In this article, we use web-based architecture in developing a new discharge summary system of National Taiwan University Hospital, and improve the traditional client/server architecture of old system. This article introduces the design considerations and implementation level in detail, including summary search and query, model and phrase quoted, summary check list, major editing blocks and other functionalities.