Disclosed is an unmanned automated hook-fastening device including a device coupler, a propulsion unit, a transmitter, a receiver, hook pliers, and an unloading transmitter. The propulsion unit adjusts the position of the hoisting unit with respect to the object, on the basis of the position signal transmitted by the transmitter and received by the receiver, and adjusts the position of the hoisting unit coupled to the object, on the basis of the position signal transmitted by the unloading transmitter and received by the receiver. It is possible to easily track the position of a hook of the object to be hoisted, automatically fasten the hook pliers to the hook, and automatically fasten the hook to a crane without a monitoring system.