In the future, wearable computers are going to be exploited for different applications to support human life. In this paper, we present a new wearable computing system that supports daily conversation based on speech recognition and information retrieval technologies. In daily conversation, sometimes we do not know the meaning of a new word or we want to know more information about a topic. In such cases, we can get more information to make our conversation more interesting and fluent by receiving auxiliary information from a wearable computer. The proposed system analyzes conversation content and retrieves information related to ongoing conversations from the Internet to make them more interesting and beneficial. We have implemented a prototype system, and the results of actual use have shown the need for such a system.