A smart meeting room usually refers to a working environment, which can provide meeting attendees with a highly effective information acquisition and exchange space, with an aim to improve the working and decision-making efficiency. Concerning on the needs of attendees in a smart meeting room, this paper explores the issue of how to make computing devices interoperate spontaneously based on context-awareness so as to provide users with adaptable and suitable services. We abstract devices spontaneous interoperations into three categories and present our design and implementation of a context-aware spontaneous interoperation of information devices in building a smart meeting room.