The invention provides a dialogue control device and a dialogue control method. An emotion estimator of the dialogue control device estimates a dialogue partner's emotion based on the dialogue partner's facial expression or voice prosody. The dialogue controller controls the dialogue with the dialogue partner using a topic selected based on whether the emotion estimated by the emotion estimator is good or bad. Specifically, the dialogue controller controls the dialogue with the dialogue partner based on a topic map created by a topic mapper and including a topic that the dialogue partner likes.