To provide information accurately recording progress leading to an accident and not relying on human memory which is indistinct or at variance with facts, and to accurately collate it with past error rate precedents in a short time.

Accident form analysis data 201 is prepared on the basis of picture image information of the accident recorded by a digital video camera, and this data is collated by use of a computer 5 with a database 9 of past culpa rate precedents converted into data for performing error rate evaluation.