A machine tool for performing a cutting process on a workpiece with a cutting tool, includes: a pre-machining shape acquisition unit configured to acquire the shape of the workpiece before cutting, as a pre-machining shape; a target shape acquisition unit configured to acquire a target shape of the workpiece after cutting; a differential shape acquisition unit configured to acquire a differential shape between the pre-machining shape and the target shape; and a machining path setting unit configured to set machining paths so as to perform the cutting process on the differential shape only.