PROBLEM TO BE SOLVED: To accurately predict the harvest date, harvest amount, size, etc. of fruits to provide a harvest prediction system for institution-cultivated fruits with high commercial value by securing a cheap and reliable harvesting labor force and a superior and reliable shipping destination. Can be provided. SOLUTION: A fruit harvest date predicting unit 3 for determining a flowering date of a strawberry, which is a fruit, from a temporal image 20 of a fruit photographed by an imaging camera 114, and setting a harvesting day from an estimated integrated temperature in a house after the flowering date. , Fruit yield prediction unit 4 that predicts the number of strawberries harvested by accumulating information on the number of flowers of strawberries, flower bed volume calculator 5 that calculates the flower bed volume of strawberries, and predict the size of strawberries from the flower bed volume And a fruit size prediction unit 6 for [Selection diagram] Figure 1【課題】果実の収穫日、収穫量、サイズ等を精度よく予測することで、安価で確実な収穫労働力と優良で確実な出荷先の確保により商品価値の高い施設栽培果実の収穫予測システムが提供できる。【解決手段】撮像カメラ114により撮影した果実の経時画像20から果実であるイチゴの開花日を確定し、開花日以降のハウス内の予定積算温度から収穫日を設定する果実収穫日予測部3と、イチゴの開花数情報を積算してイチゴの収穫数を予測する果実収穫数予測部4と、イチゴの花床体積を算定する花床体積算定部5と、花床体積からイチゴのサイズを予測する果実サイズ予測部6とを備える。【選択図】図1