Abstract: A communication device includes a command-message analysis unit that determines whether a command message received via a network is a command-registration command message based on a command part of the received command message, a storage unit that stores therein a command-message issuing condition, a command-message issuing destination, and a to-be-issued command message included in a data part of command-registration command message and associated with each other when the communication device receives the command-registration command message, a command-message issuing-condition-satisfaction determination unit that detects that the command-message issuing condition stored in the storage unit is satisfied, and a command-message issuing unit that transmits the to-be-issued command message associated with the satisfied command issuing condition to the command-message issuing destination associated with the satisfied command-message issuing condition as a destination.