An object of the present invention is to provide a work evaluation system capable of appropriately evaluating mowing work. A work evaluation system for evaluating a mowing operation performed by a work vehicle includes: a state information obtaining unit configured to obtain vehicle state information indicating a state of the work vehicle when performing the mowing operation； A sound data acquisition unit 32 that acquires sound data obtained by collecting surrounding sounds, a foreign matter amount calculation unit 33 that calculates the amount of foreign matter present in a work place that comes into contact with a cutting blade during mowing work, based on the sound data, An evaluation unit that evaluates the mowing operation performed in the work place based on the vehicle state information and the amount of the foreign matter. [Selection diagram] FIG.【課題】草刈り作業を適切に評価することが可能な作業評価システムを提供する。【解決手段】作業車両により行われた草刈り作業の評価を行う作業評価システム２００は、草刈り作業を行う際の作業車両の状態を示す車両状態情報を取得する状態情報取得部３１と、作業車両の周囲の音を集めた音データを取得する音データ取得部３２と、音データに基づいて、草刈り作業時に刈り刃と接触する作業地に存在する異物の量を算定する異物量算定部３３と、車両状態情報と異物の量とに基づいて、作業地において行われた草刈り作業の評価を行う評価部３４と、を備える。【選択図】図３
