The present invention is capable of maintaining or improving the concentration of a user without any of a visual stimulant, an auditory stimulant, or an olfactory stimulant. This environment control system comprises an environment forming device (10) and a control device (20). The control device (20) includes a storage unit (21), a processing unit (22), and an instruction unit (23). The storage unit (21) stores first period information that determines an operation period (Ts) of the environment forming device (10) such that an awakening airflow (Fs) for restoring concentration of the user (Us)is formed, second period information that determines a reference period (Tw) which is longer than the operation period (Ts), and velocity information that determines wind velocity of the awakening airflow (Fs). The processing unit (22) determines operation of the environment forming device (10) on the basis of the first period information, the second period information, and the velocity information. The instruction unit (23) instructs the environment forming device (10) on the operation determined by the processing unit (22). The reference period (Tw) is determined so as to include at least one operation period (Ts).La présente invention est capable de maintenir ou daméliorer la concentration dun utilisateur sans lun quelconque dun stimulant visuel, dun stimulant auditif ou dun stimulant olfactif. Ce système de commande denvironnement comprend un dispositif de formation denvironnement (10) et un dispositif de commande (20). Le dispositif de commande (20) comprend une unité de stockage (21), une unité de traitement (22) et une unité dinstruction (23). Lunité de stockage (21) stocke des premières informations de période qui déterminent une période de fonctionnement (Ts) du dispositif de formation denvironnement (10) de telle sorte quun flux dair déveil (Fs) pour rétablir la concentration de lutilisateur (Us) est formé, des secondes informations de période qui déterminent une péri
