PROBLEM TO BE SOLVED: To provide a researching method, a researching device, a researching system, a computer program and a recording medium with improved operability of a researcher to reduce a researching time.;SOLUTION: A database recording a record wherein data on a plurality of items are correlated with identification information identifying a researching target is reconstructed. An index file extracting the identification information identifying the researching target, and the data and an item name concerning the item is generated to a researching key. Research is executed by use of the generated index file. The data and the item name of the item concerning the researching key are extracted, and are exhibited to the researcher as the item for the narrowing-down researching.;COPYRIGHT: (C)2004,JPO
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