Activity information acquisition unit (100) to (10a), acquires the activity information indicating the activity intellectual productivity measurement device. Event information acquisition unit (10b) obtains information indicating the event, including the information of time to occur. Evaluation acquisition unit (4), to obtain a subjective evaluation. Short-term context input portion (11a), and generates activity information from the short-term context. Long-term context input portion (11b) extracts event information from a long-term context. Model generation unit (5), the value of using a mapping function into the space of subjective evaluation from the direct sum space of the space in the long-term context and space of the short-term context, was mapping the long-term context and short-term context is subjective to fall within the scope of evaluation, to produce an estimated model parameters of the mapping function. Intellectual productivity computing unit (6), to calculate the intellectual productivity by using the estimated model.
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