A remotely controlled apparatus for transporting liquid, such as oil, toxic chemicals, or the like, in a tank of a sunken ship to a floating body, without leakage and a method performed by the apparatus are disclosed. An underwater recovery device (100) of the apparatus includes a supporting frame (10), to which a plurality of devices including a linkage (111) are fixed, chucking devices (20) for fixing the underwater recovery device (100) to the sunken ship (500), a grabber (30) for attaching the base plate (80) to the supporting frame (10), DTB systems 40 for attaching the base plate (80) to the sunken ship (500), thrusters (50) for providing a propulsive force so as to attach the supporting frame (10) to the sunken ship (500), a hole cutter (60) for drilling a hole for the recovery of the liquid, and a liquid recovery device (70) for recovering the liquid through the hole drilled in the sunken ship (500).