A server for acquiring device data from each of a plurality of devices and storing the acquired device data in a memory , the server comprising: a device data acquiring unit configured to acquire the device data from each of the plurality of devices , each of the device data including device specifying information for specifying corresponding one of the plurality of devices which is a supply source of the device data; a device data storing unit configured to store the acquired device data in the memory in accordance with a predetermined style, the predetermined style including stronghold information related to installed locations of the plurality of devices and term information related to operating terms of the plurality of devices ; a partial aggregating unit configured to aggregate a part of stored data in accordance with a preset aggregation condition and create partially aggregated data, the stored data being the device data which are acquired from each of the plurality of devices and stored in the memory; a partially aggregated data storing unit configured to store the created partially aggregated data in the memory , wherein the partial aggregating unit is further configured to aggregate, every specific period of time, data related to corresponding devices for each of a plurality of strongholds corresponding to the stronghold information, each of a plurality of term segments corresponding to the term information, and each of combinations thereof, and to create the partially aggregated data; a request acquiring unit configured to acquire a browsing request from a terminal device ; a browsing data creating unit configured to create browsing data indicating operating states in the plurality of devices by using the partially aggregated data in the memory in a case where the browsing request is acquired; and a browsing data supplying unit configured to supply the created browsing data to the terminal device . a device data acquiring unit configured to acquire the device data from each of the plurality of devices , each of the device data including device specifying information for specifying corresponding one of the plurality of devices which is a supply source of the device data; a device data storing unit configured to store the acquired device data in the memory in accordance with a predetermined style, the predetermined style including stronghold information related to installed locations of the plurality of devices and term information related to operating terms of the plurality of devices ; a partial aggregating unit configured to aggregate a part of stored data in accordance with a preset aggregation condition and create partially aggregated data, the stored data being the device data which are acquired from each of the plurality of devices and stored in the memory; a partially aggregated data storing unit configured to store the created partially aggregated data in the memory , wherein the partial aggregating unit is further configured to aggregate, every specific period of time, data related to corresponding devices for each of a plurality of strongholds corresponding to the stronghold information, each of a plurality of term segments corresponding to the term information, and each of combinations thereof, and to create the partially aggregated data; a request acquiring unit configured to acquire a browsing request from a terminal device ; a browsing data creating unit configured to create browsing data indicating operating states in the plurality of devices by using the partially aggregated data in the memory in a case where the browsing request is acquired; and a browsing data supplying unit configured to supply the created browsing data to the terminal device . <EOS>