An emotion estimating system includes a learning model and an estimation unit. The learning model accepts external information and biological information as input, and outputs an emotion of a user. The estimation unit changes a weighting applied to external information about the user detected by a first detector and a weighting applied to biological information about the user detected by a second detector in accordance with a situation around the user, and estimates the emotion output as a result of inputting external information and biological information changed by the respective weightings into the learning model as the emotion of the user.