A method for remotely managing at least one device by an intermediary management device supporting a device management service provided from a device management server through an external network, wherein the at least one device does not include a device management client according to a device management protocol of the device management service, the method comprising the steps of: collecting (303, 305), by the intermediary management device, device information of the at least one device connected with the intermediary management device through a personal area network; converting, by the intermediary management device, partial information for identifying the at least one device among the device information, to converted device information of a form based on the device management protocol supported by the device management server; transferring, by the intermediary management device, the converted device information and device management function list information to the device management server through the external network; receiving, by the intermediary management device from the device management server through the external network, one of: function management data related to the at least one device, and an address from which function management data related to the at least one device can be downloaded; when the function management data related to the at least one device is received: transferring, by the intermediary management device, the received function management data to the at least one device through the personal area network; and when the address from which function management data related to the at least one device can be downloaded is received: establishing a session with a service providing server based on the address, receiving the function management data from the service providing server, and transferring the received function management data to the at least one device through the personal area network; wherein, in establishing the session with the service providing server, the intermediary management device transmits an indicator indicating that the intermediary management device performs the device management service for the at least one device; wherein the device management function list information comprises a list of device management functions supported by the at least one device among multiple device management functions based on the device management protocol, and wherein the function management data is generated by one of the device management server or the service providing server based on the device management function list information and comprises information required to perform at least one device management function of the device management function list information. collecting (303, 305), by the intermediary management device, device information of the at least one device connected with the intermediary management device through a personal area network; converting, by the intermediary management device, partial information for identifying the at least one device among the device information, to converted device information of a form based on the device management protocol supported by the device management server; transferring, by the intermediary management device, the converted device information and device management function list information to the device management server through the external network; receiving, by the intermediary management device from the device management server through the external network, one of: function management data related to the at least one device, and an address from which function management data related to the at least one device can be downloaded; when the function management data related to the at least one device is received: transferring, by the intermediary management device, the received function management data to the at least one device through the personal area network; and when the address from which function management data related to the at least one device can be downloaded is received: establishing a session with a service providing server based on the address, receiving the function management data from the service providing server, and transferring the received function management data to the at least one device through the personal area network; wherein, in establishing the session with the service providing server, the intermediary management device transmits an indicator indicating that the intermediary management device performs the device management service for the at least one device; establishing a session with a service providing server based on the address, receiving the function management data from the service providing server, and transferring the received function management data to the at least one device through the personal area network; wherein, in establishing the session with the service providing server, the intermediary management device transmits an indicator indicating that the intermediary management device performs the device management service for the at least one device; wherein the device management function list information comprises a list of device management functions supported by the at least one device among multiple device management functions based on the device management protocol, and wherein the function management data is generated by one of the device management server or the service providing server based on the device management function list information and comprises information required to perform at least one device management function of the device management function list information.