PROBLEM TO BE SOLVED: To improve convenience of a user by improving search efficiency, by searching a plurality of pieces of data of different types regarding the same case collectively and cross-sectionally.SOLUTION: In a case evidence management system 5, a police officer can cross-sectionally search content data registered in DB14z of an external memory device 14 with a specific keyword showing a police officer, a witness or a suspect. On a clip board CLB, the content data to which attention is paid by the police officer is temporarily stored by an operation of the police officer. On a search result screen, content data stored in the clip board is displayed as an association candidate. The selected association candidate is associated with the searched content data. The search result screen displays a list of the associated data.SELECTED DRAWING: Figure 1
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