device and information given by an input of an operator the date in the accompanying information is for example a generation date of medical data the date in the accompanying information may include not only a date but also year time and the like in the case of medical image data an image capture date may be set to the generation date in the case of document data a date of generation of a document may be the generation date or a date of generating data by scanning a document may be the generation date the date in the accompanying information is an example of an exemplary embodiment of time information the medical data output unit 22 outputs medical data stored in the storage unit 21 to the display terminal 3 in response to a request of the display terminal 3 the display terminal 3 is a general personal computer the display terminal 3 has a display unit 31 a display control unit 32 an input unit 33 and a data request unit 34 the display unit 31 is an lcd liquid crystal display a crt cathode ray tube or the like as shown in fig2 the display control unit 32 has a list image display control unit 321 a period image display control unit 322 and a generation time instruction image display control unit 323 by a program stored in.