a lower traveling body;

an upper rotating body rotatably supported on the lower traveling body;

a work machine which comprises a boom rotatable with respect to the upper rotating body, an arm rotatable with respect to the boom, a bucket rotatable with respect to the arm, and a tilt rotator comprising a tilting actuator for supporting the bucket to tilt with respect to the arm, and a rotating actuator for supporting the bucket to rotate with respect to the arm;

an operation lever for outputting an operation signal corresponding to an operation amount of a driver;

a location information providing unit for providing location information and posture information of the work machine;

a work setting unit for setting a work area of the work machine, and providing plane information of the work area; and

an electronic control unit for controlling the work machine according to a signal inputted from at least one of the operation lever, the work setting unit and the location information providing unit,

wherein the electronic control unit controls the posture of the bucket so that the tip of the bucket contacts the work area,

wherein the electronic control unit calculates a normal vector of the work area in consideration of plane information of the work area,

wherein the electronic control unit calculates a movement direction vector of the bucket in consideration of the location information and posture information of the work machine,

wherein the electronic control unit calculates a width direction vector of the bucket tip by outer products of the movement direction vector of the bucket and the normal vector of the work area.