Computerization of experiment notebooks that satisfy requirements for experiment records and effective utilization of computerized experiment notebooks and experiment data are facilitated. A computer used by the experimenter comprises: a first means for displaying an experiment notebook form on the screen of a display unit and receiving description data for individual description items on the screen via input means; a second means for checking whether or not required description items are all filled with description data and storing such data; a third means for transmitting the experiment notebook data and experiment data to a management computer; a fourth means for allowing the management computer to integrally edit (by pasting) the experiment data with respect to the experiment notebook data, converting into experiment notebook data of a file format (PDF) for which only reference is allowed, and storing in an experiment notebook database; and a fifth means for storing the experiment data in an experiment data-database with the addition of link information associated with the experiment notebook data.