An autonomous travel system comprising: a farm field acquisition unit that is configured to obtain information of a farm field including a work area and a headland area, wherein in the work area a travel path for a work vehicle on which a work machine is mounted to autonomously travel to perform work is set, and wherein the headland area is formed between the work area and a farm field peripheral edge; and the autonomous travel system further comprises: an auxiliary line creation unit (36, 37) that is configured to create an auxiliary line for causing the work vehicle to autonomously travel in the headland area; characterized by a selection processing unit that is configured to perform a process of allowing a user to select in which of the work area and the headland area the work is to be performed, or the selection processing unit is configured to perform a process of allowing a user, after the work in the work area is completed, to select whether a work in the headland area is to be performed or the work is to be ended without performing a work in the headland area; and a travel control unit that is configured to cause the work vehicle to autonomously travel along at least a part of the auxiliary line created by the auxiliary line creation unit, wherein the autonomous travel system further comprising: a display control unit configured to display the auxiliary line, wherein the display control unit is configured to display the format of the auxiliary line differently between when the work vehicle is travelling autonomously in the work area and when the work vehicle is travelling autonomously along the auxiliary line. a farm field acquisition unit that is configured to obtain information of a farm field including a work area and a headland area, wherein in the work area a travel path for a work vehicle on which a work machine is mounted to autonomously travel to perform work is set, and wherein the headland area is formed between the work area and a farm field peripheral edge; and the autonomous travel system further comprises: an auxiliary line creation unit (36, 37) that is configured to create an auxiliary line for causing the work vehicle to autonomously travel in the headland area; characterized by a selection processing unit that is configured to perform a process of allowing a user to select in which of the work area and the headland area the work is to be performed, or the selection processing unit is configured to perform a process of allowing a user, after the work in the work area is completed, to select whether a work in the headland area is to be performed or the work is to be ended without performing a work in the headland area; and an auxiliary line creation unit (36, 37) that is configured to create an auxiliary line for causing the work vehicle to autonomously travel in the headland area; characterized by a selection processing unit that is configured to perform a process of allowing a user to select in which of the work area and the headland area the work is to be performed, or the selection processing unit is configured to perform a process of allowing a user, after the work in the work area is completed, to select whether a work in the headland area is to be performed or the work is to be ended without performing a work in the headland area; and a travel control unit that is configured to cause the work vehicle to autonomously travel along at least a part of the auxiliary line created by the auxiliary line creation unit, wherein the autonomous travel system further comprising: a display control unit configured to display the auxiliary line, wherein the display control unit is configured to display the format of the auxiliary line differently between when the work vehicle is travelling autonomously in the work area and when the work vehicle is travelling autonomously along the auxiliary line. a display control unit configured to display the auxiliary line, wherein the display control unit is configured to display the format of the auxiliary line differently between when the work vehicle is travelling autonomously in the work area and when the work vehicle is travelling autonomously along the auxiliary line.