This paper mainly introduces the design and implementation of the resident workstation of the mobile hospital information system (HIS). The main contributions include needs analysis, system design, implementation and test according to the current needs of the hospital business. The system uses Client/Server (C/S) architecture with three layers, they are the presentation layer, business logic layer and data layer, respectively. The development toolkits include PB language, 10g oracle technology and the mobile clients were implemented with iOS.