PROBLEM TO BE SOLVED: To provide a plant cultivation system capable of stabilizing the yield without decreasing productivity.SOLUTION: A plant cultivation system is such that in a first cultivation unit and a second cultivation unit which include an area to cultivate plants in the inside, and can adjust independently of an external environment, the cultivation environment of plants to be cultivated in the area, plants are cultivated according to a cultivation plan fixed for each of the prescribed cultivation units. A control processing part changes in a plant cultivation process, a first cultivation plan, based on a predetermined yield based on the first cultivation plan of cultivating plants in the first cultivation unit, and a plant estimated yield estimated according to the growth degree of plants cultivated in the first cultivation unit, and a second cultivation plan of cultivating plants in the second cultivation unit, respectively. Furthermore, the control processing part secures a predetermined yield in a predetermined harvest time based on the first cultivation plant.
