To provide a management system and a management method for managing a total security including a network environment and a crime prevention in a housing complex, etc.

The management system, as one aspect of the present invention, having a plurality of management areas each formed as an aggregation provided with at least one management object device to be used therein, comprises a relay device for relaying a communication to connect to the management object device, a security management device for managing the security in the management areas, having a reading unit for reading a device identifier of the management object device, and having a communication unit for enabling communication to external devices, and a management device for managing networks in the management areas and a plurality of the management object devices after performing the communication setting to the relay device based on the device identifier.