Abstract: According to the present invention, a method for searching for information using the Web and a method for voice conversation using same involve generating a basic word vector for at least one of a provided user query and a language analysis result; using the basic word vector, searching a vector space database for a vector space corresponding to the basic word vector; searching, if a similarity between the basic word vector and the found vector space is lower than a preset reference, a vector space database for a vector space corresponding to an expanded word vector using the expanded word vector generated from the result of the Web search performed using at least one of the user query and the language analysis result; and searching for knowledge information on the basis of the vector space found in the basic searching step or the expanded searching step. Thus, improved research results may be provided in response to the user query.

Abstract: Disclosed are a conversation management method and a device for executing same are disclosed. The device includes: a calculation unit for calculating the importance of an utterance intention, the similarity between utterance intentions, and the relative distance between utterance intentions using at least one of a plurality of utterance intentions in a corpus and an utterance intention in a sequence relationship with the at least one utterance intention; a similarity calculating unit for calculating the similarity between conversation flows by comparing a conversation flow obtained from a corpus and a conversation flow obtained from a user utterance by means of the importance and similarity of an utterance intention; and an utterance intention verifying unit for calculating an evaluation score of an utterance intention by evaluating a user utterance according to the relative distance between utterance intentions.