Sensor axis adjustment device and sensor axis adjustment method

A sensor axis adjustment system that adjusts a sensor axis of an external environment sensor in a vehicle in which the external environment sensor that detects an external environment is attached to a vehicle body, the sensor axis adjustment system comprising:

• an adjustment target of the sensor axis;
• a position and direction calculation unit that calculates an attachment position of the external environment sensor and a direction of the sensor axis;
• a normal posture calculation unit that calculates a normal posture of the adjustment target with respect to the vehicle body on the basis of a calculation result of the position and direction calculation unit;
• and
• a movement unit that moves at least one of the adjustment target and the vehicle body so that a posture of the adjustment target with respect to the vehicle body becomes the normal posture,
• wherein the adjustment target is equipped with a measurement device that measures characteristics of an electromagnetic wave incident to an incident surface of the adjustment target, and
• wherein the position and direction calculation unit calculates the attachment position of the external environment sensor and the direction of the sensor axis based on a first measurement result by the measurement device when the adjustment target is positioned in a first position and a second measurement result by the measurement device when the adjustment target is positioned in a second position, the second position being farther from the vehicle body than the first position.