1. A component mounting robot system comprising:a component transfer robot which transfers a mounting component to a mounting position of a base component, the mounting component being a component to be mounted and including a mounting portion; and
a jig which corrects a position of the mounting portion of the mounting component transferred by the component transfer robot to the mounting position,
wherein the jig includes a guide portion which corrects the position of the mounting portion of the mounting component to the mounting position,
wherein the component transfer robot includes a holding section which holds the mounting component so that a posture of the mounting component is changeable,
wherein the holding section includes a holding member with a holding surface that holds an upper portion or side surface of the mounting component,
wherein the holding member is formed in a tubular shape, and
wherein a posture of the holding member is changeable in such a way that an inclination of the holding surface with respect to a center axis of the holding member is changeable due to the mounting portion of the mounting component being guided by the guide portion.