A computer-implemented method for generating a control signal for a tele-presence robot by a computing device based on a movement of an operator, the method includes calculating a direction where at least part of the operator is positioned based on a camera acquiring an image of the at least part of the operator; calculating an orientation where the at least part of the operator points; and generating at least one motion parameters of the tele-presence robot as the control signal based on the direction in combination with the orientation, wherein the direction and the orientation are reflected to the at least one motion parameters differently.