Data transmitted from an information transmission device can be stored in a distributed manner, without the need to duplicate or transmit/receive data among information storage devices. Under the control of a data write unit, end points to be assigned are determined in each of the information storage devices, based on the preset information indicating a correspondence between the information storage devices and end points assigned to the information storage devices. The data transmitted together with the identifier corresponding to the assigned end point is acquired from among the data transmitted from the information transmission devices, based on a first correspondence table stored in a shared setting storage unit for associating the end points with the identifiers of the types of data acquired by the end points, and the acquired data is stored in the data storage unit.