A turning driving device includes a directional motor, and a wheel hub motor module and a driving device disposed above and below the directional motor, respectively. The directional motor includes a rotation shaft, and the wheel hub motor module includes a fixing frame, and a roller rotatable about a horizontal fixed axle. The fixing frame is mounted with the fixed axle, and the rotation shaft is combined with a bottom of the fixing frame. The driving device includes a control module electrically connected to the directional motor and the wheel hub motor module. When the control module outputs and transmits a control signal to the directional motor and the wheel hub motor module, the rotation shaft drives the fixing frame to horizontally turn to a preset angular position, and the roller is driven to vertically rotate to drive the article to move toward a predetermined direction.