Moment refers to the rotational action of force on an object, which is determined by the magnitude of force and the distance from the point of action to the axis of rotation. The direction of the moment is perpendicular to the direction of the force and the direction of the rotation axis, following the right-hand screw law. Moment can make an object rotate or balance around the axis of rotation. Torque refers to the rotational action of force on an object, which is determined by the magnitude of force and the distance from the point of action to the axis of rotation. The direction of torque is along the rotation axis and follows the right-handed screw law. Torque is usually used to describe the rotating torque output by engines, motors and other equipment. To sum up, both torque and torque are the rotating effects of force on objects, but the direction of torque is perpendicular to the force and the rotation axis, while the direction of torque is along the rotation axis. This is their main difference.