A portable computer and portable docking station arrangement includes a portable docking station equipped with a keyboard, a swinging bracket pivoted to the portable docking station, and a portable computer insertable into the swinging bracket in one of two reversed directions for enabling the arrangement to be used as a notebook computer or a tablet PC. A spare battery pack is provided at the portable docking station, and chargeable by external power supply upon insertion of the portable computer into the swinging bracket. Data transmission between the portable docking station and the portable computer may be achieved by a wired transmission method or wireless transmission method.