A control method for a mobile object that automatically moves, the control method comprising: acquiring positional information of a transport vehicle parked in a parking region, the positional information including information of a position of a rear end portion (Vb) of the transport vehicle, information of an attitude of the transport vehicle, and information of a length of the transport vehicle in a coordinate system of a two-dimensional surface of the parking region; setting a first path toward the transport vehicle based on the positional information of the transport vehicle; and causing the mobile object to move along the first path, the control method further comprising: acquiring relative target position information indicating a relative position of the target position with respect to the transport vehicle using a method other than a method of directly detecting a target position in the transport vehicle with a sensor, wherein the setting of the first path includes setting the first path toward the target position based on the positional information of the transport vehicle and the relative target position information, wherein the relative target position information indicates coordinates of the target position in a coordinate system of the transport vehicle, and wherein the acquiring of the relative target position information includes: acquiring the relative target position information based on information indicating a number of target objects disposed in the transport vehicle, or, acquiring an identifier, which is given to each of positions at which the target objects are disposed, as the relative target position information set in advance. acquiring positional information of a transport vehicle parked in a parking region, the positional information including information of a position of a rear end portion (Vb) of the transport vehicle, information of an attitude of the transport vehicle, and information of a length of the transport vehicle in a coordinate system of a two-dimensional surface of the parking region; setting a first path toward the transport vehicle based on the positional information of the transport vehicle; and causing the mobile object to move along the first path, the control method further comprising: acquiring relative target position information indicating a relative position of the target position with respect to the transport vehicle using a method other than a method of directly detecting a target position in the transport vehicle with a sensor, wherein the setting of the first path includes setting the first path toward the target position based on the positional information of the transport vehicle and the relative target position information, wherein the relative target position information indicates coordinates of the target position in a coordinate system of the transport vehicle, and wherein the acquiring of the relative target position information includes: acquiring the relative target position information based on information indicating a number of target objects disposed in the transport vehicle, or, acquiring an identifier, which is given to each of positions at which the target objects are disposed, as the relative target position information set in advance. acquiring relative target position information indicating a relative position of the target position with respect to the transport vehicle using a method other than a method of directly detecting a target position in the transport vehicle with a sensor, wherein the setting of the first path includes setting the first path toward the target position based on the positional information of the transport vehicle and the relative target position information, wherein the relative target position information indicates coordinates of the target position in a coordinate system of the transport vehicle, and wherein the acquiring of the relative target position information includes: acquiring the relative target position information based on information indicating a number of target objects disposed in the transport vehicle, or, acquiring an identifier, which is given to each of positions at which the target objects are disposed, as the relative target position information set in advance. acquiring the relative target position information based on information indicating a number of target objects disposed in the transport vehicle, or, acquiring an identifier, which is given to each of positions at which the target objects are disposed, as the relative target position information set in advance.