CONTROL DEVICE, CONTROL METHOD AND PROGRAM FOR PLANETARIUM

Provided is a quick-responsive voice control technique even in use in a planetarium. A control device (100) of a projector (308) of a planetarium includes: a storage unit (304) that stores a plurality of commands for controlling the projector (308), flags indicating whether or not the respective commands can be executed, and keywords associated with the respective commands; a voice acquisition unit (301) that acquires voice data; a control unit (201) that controls the control device; and a communication unit (207) that communicates with the projector (308). The control unit (201) determines whether or not each of the commands for the projector (308) can be executed on the basis of state information of the projector (308), the state information being acquired through the communication unit (207), updates the flags on the basis of the determination result, generates character suing information from voice data acquired by the voice acquisition unit (301), acquires a command in which an executable flag is set from the storage twit (304) using the character string information as a search key, and transmits the acquired command to the projector (308).