Mechanical arm control system, method and engineering machinery

The invention discloses a mechanical arm control system, and also relates to a mechanical arm control method and engineering machinery. The mechanical arm control system comprises an acquisition device, a controller and a driving device, wherein the acquisition device is used for acquiring a position relation signal of a first coordinate system of a manipulating element of a remote controller and a second coordinate system of the tail end of a mechanical arm, and an action direction signal of the manipulating element; the controller is used for receiving the position relation signal and the action direction signal and sending a direction control command of controlling the tail end of the mechanical arm to act; and the driving device is used for receiving the direction control command and controlling arm joints to move so as to drive the tail end of the mechanical arm and a control element of the remote controller to move in the same direction, thereby enabling an operator to more intuitively and vividly control the mechanical arm, being helpful for the operator to judge the control direction and improving the control efficiency of the mechanical arm.