<P>PROBLEM TO BE SOLVED: To provide a system capable of judging right and left confirmation operation and preparation for a brake without imposing a burden on a driver so much and quantitatively measuring dangerous drive preventive intention of the driver. <P>SOLUTION: The dangerous drive preventive intention judgment system 10 includes a computer 12, which acquires angular velocity data from an angular velocity sensor 14 set on the head of a driver and an angular velocity sensor 16 set at the tip of the right foot, for example, acquires present position data from a position detection device 18, and records the acquired data at a drive data recording device 24. When an automobile is close to a dangerous place such as an intersection without traffic lights it is judged in accordance with the angular velocity data whether a visual confirmation operation or a preparation for a brake is carried out for dangerous drive prevention. A judgment result of the visual confirmation operation or the preparation for the brake in respect of the dangerous place, for example, is recorded in the drive data recording device 24. Further, when such judgment is made that the visual confirmation operation or the preparation for the brake is not carried out, an alarm is sounded from an alarm device 22. <P>COPYRIGHT: (C)2009,JPO&INPIT 
DANGEROUS DRIVE PREVENTIVE INTENTION JUDGMENT SYSTEM AND DANGEROUS DRIVE PREVENTIVE INTENTION JUDGMENT METHOD