Based on the unconscious design theory, the interface design of intelligent service system is carried out for the autonomous management of high-speed train passengers?? luggage. Through the analysis on user??s portrait and psychological needs, the design feasibility is established, the user experience and interaction process is sorted out and the user??s experience expectations and the path how to assort unconscious design are discussed to obtain the design conclusion in conformity with interface effects. The data model of major users is established and improved by analyzing pain points through user survey and classifying the real situation of carrying luggage. “User needs-key factors-strategy method” is used to analyze the data of the user needs model. The user??s behavior can be stimulated and guided by defining the interactive content, information hierarchy and functional architecture based on user??s unconsciously experience map. Through the analysis, the interaction experience with high user satisfaction is obtained. In the luggage management system such as vehicle storage information inquiry and reservation, luggage status inquiry and luggage safety reminder, the interface design conforming to the autonomous management of luggage is completed, and the intelligence and humanization of high-speed train luggage management are improved.