关键词: 产品设计, 服务设计, 用户体验, 人机交互, 工业设计

Abstract: To explore the application of Service Design (SD) in handheld mobile devices，an approach of user-center SD was proposed proceed from industrial design situation.The related literatures of SD and user-center SD were introduced，and the SD model between service provider and receiver was put forward.The SD was divided into explicit factors and implicit factors，and the explicit design model of implicit service factors was present.By analyzing the knowledge transformation among analysis and planing，development design and design test，the user-center SD process model was built.To take M-Coupon SD for an example，the service model was analyzed.Users were asked to participate in the whole design process，and the user role model as well as menu tree were set up through user demand research and service function demand analysis.Thus the service prototype and system detail design were accomplished.The user-center SD theory system was verified by design test.

Key words: product design, service design, user experience, human-computer interaction, industrial design, usability