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 (70, 80); 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 (70, 80). 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 (70, 80); 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 (70, 80).