Provided is a method of a host device managing at least one external device connected to the host device through a management server. The method includes: obtaining measurement information measured by the at least one external device； requesting authorization by the management server； transmitting the obtained measurement information to the management server when the authentication succeeds； receiving management information for managing the at least one external device, where the management information is generated based on the measurement information by the management server； and managing the at least one external device based on the received management information.
