Public facilities are the basis of urban public space, and public facilities are core parts of emergency shelters. It is important that the design of rescue facilities focuses on relief efforts. This article analyzes the present situation and raises questions about the study on the design of public facilities in emergency shelters, then applies theory related to design semiotics, cites examples, and suggests improvements on the usability and completeness of public facilities in emergency shelters. Facilities design in emergency shelters provides the theoretical foundation to make rescue system of emergency shelter more effective in the future.