A data collection controller 4 to and from which a removable memory 12 can be attached and removed is mounted on a vehicle 1, and is connected to a predetermined data storage 3. In the data collection controller, driver codes, service route codes, and the like can be entered with code setting buttons 8 and 9, while these code data and data in the predetermined data storage can be downloaded with a download button 7 into the removable memory. The downloading is performed every time the driving of the vehicle is completed. The removable memory is collected when a predetermined time period (for example, one month) has elapsed. Driving information for each driver and each service route is analyzed based on the data recorded in the collected removable memory.