A device management system comprising: a device to be installed in a building; a control terminal connected to the device; and a management apparatus connected to the control terminal via a network, wherein both the control terminal and the management apparatus are configured to be capable of acquiring a control command that is created by a user, (a) the device management system is configured such that the control command that is created by the user is acquired by either one or both of the control terminal and the management apparatus, (b) the device management system is configured such that, on the basis of the control command that is acquired in the (a), control of the device is executed in either one of the control terminal and the management apparatus, or the control of the device is shared and executed in both of the control terminal and the management apparatus, and (c) the control terminal and the management apparatus are configured to register the control command that is acquired in the (a), characterized in that: the management apparatus is configured to (d) determine whether the control command that is acquired in the (a) is to be executed in the management apparatus or to be executed in the control terminal, execute the control command if it is determined that the control command is to be executed in the management apparatus in the (d), and (e) transmit the control command to the control terminal if it is determined that the control command is to be executed in the control terminal in the (d); and the control terminal is configured to execute the control command that is transmitted from the management apparatus in the (e). a device to be installed in a building; a control terminal connected to the device; and a management apparatus connected to the control terminal via a network, wherein both the control terminal and the management apparatus are configured to be capable of acquiring a control command that is created by a user, (a) the device management system is configured such that the control command that is created by the user is acquired by either one or both of the control terminal and the management apparatus, (b) the device management system is configured such that, on the basis of the control command that is acquired in the (a), control of the device is executed in either one of the control terminal and the management apparatus, or the control of the device is shared and executed in both of the control terminal and the management apparatus, and (c) the control terminal and the management apparatus are configured to register the control command that is acquired in the (a), (a) the device management system is configured such that the control command that is created by the user is acquired by either one or both of the control terminal and the management apparatus, (b) the device management system is configured such that, on the basis of the control command that is acquired in the (a), control of the device is executed in either one of the control terminal and the management apparatus, or the control of the device is shared and executed in both of the control terminal and the management apparatus, and (c) the control terminal and the management apparatus are configured to register the control command that is acquired in the (a), characterized in that: the management apparatus is configured to (d) determine whether the control command that is acquired in the (a) is to be executed in the management apparatus or to be executed in the control terminal, execute the control command if it is determined that the control command is to be executed in the management apparatus in the (d), and (e) transmit the control command to the control terminal if it is determined that the control command is to be executed in the control terminal in the (d); and the control terminal is configured to execute the control command that is transmitted from the management apparatus in the (e). the management apparatus is configured to (d) determine whether the control command that is acquired in the (a) is to be executed in the management apparatus or to be executed in the control terminal, execute the control command if it is determined that the control command is to be executed in the management apparatus in the (d), and (e) transmit the control command to the control terminal if it is determined that the control command is to be executed in the control terminal in the (d); and (d) determine whether the control command that is acquired in the (a) is to be executed in the management apparatus or to be executed in the control terminal, execute the control command if it is determined that the control command is to be executed in the management apparatus in the (d), and (e) transmit the control command to the control terminal if it is determined that the control command is to be executed in the control terminal in the (d); and the control terminal is configured to execute the control command that is transmitted from the management apparatus in the (e).