PROBLEM TO BE SOLVED: To provide a method and a system for improving efficiency of work by a working dog such as a disaster rescue dog.SOLUTION: There is provided a method for improving efficiency of work by a working dog which includes: mounting an electrometer on a working dog and acquiring cardiac potential time series information by measuring a cardiac potential of the working dog; creating heartbeat fluctuation time series information from the cardiac potential time series information, and calculating emotion value time series information on the working dog based on the heartbeat fluctuation time series information; and determining whether the work by the working dog should be executed or the work by the working dog should be stopped based on the calculated emotion value time series information.SELECTED DRAWING: Figure 1【課題】災害救助犬などの使役犬による作業の効率を向上させるための方法およびシステムを提供する。【解決手段】使役犬に電位計を装着し、使役犬の心電位を計測して心電位時系列情報を得、心電位時系列情報から心拍変動時系列情報を作成し、心拍変動時系列情報に基づいて使役犬の情動価時系列情報を算出し、算出された情動価時系列情報に基づいて使役犬による作業を実行させるかまたは使役犬による作業を休止させるかの判定をすることを含む使役犬による作業の効率を向上させるための方法。【選択図】図1