PROBLEM TO BE SOLVED: To provide a system and a method for controlling plant growth environment in which, according to plant growth conditions of a plant cultivated in a plant cultivation chamber, environment inside the plant cultivation chamber can be controlled.SOLUTION: A system for controlling plant growth environment comprises: a plurality of illumination units 20, 20, ... (control parts of indoor environment) by which environment inside a plant cultivation chamber 1 can be controlled a camera 30 (a plant information detection part) which detects for each of plural areas T, T, ..., information related to growing conditions of plants 2, 2, ... arranged and cultivated in the plant cultivation chamber 1 and a control device 40 (a control part) which controls the illumination units 20, 20, ... on the basis of the growing conditions of the plants for each of the areas T, T, ... detected by the camera 30.
