A road surface survey device specifies a position at which abnormality is detected at one of a position at which abnormality on pavement of a road surface is detected from an image of a road captured by a camera and a position at which abnormality on pavement of a road surface is detected from a change in an acceleration measured when a car runs on the road surface by a G sensor. Further, the road surface survey device derives conditions that abnormality which is not detected at the specified position can be detected, and outputs an instruction of a resurvey for the specified position under the derived conditions.