Management server is provided. The management server includes a storage unit to store information about a plurality of client groups, a communication interface unit to receive management device identification information from a management device at remote distance connected to at least one image forming apparatus, a mapping unit to map at least one from among the plurality of client groups with the management device based on the received management device identification information, and a control unit to transmit an activation command to the mapped management device, the activation command directing the management device mapped with the client group to collect the information about the connected image forming apparatus.