The present invention relates to a fat removal device, which comprises: a navigation system having a first connection end and a first terminal; a hollow suction tube having a second connection end and a second terminal, wherein the navigation system is disposed inside the hollow suction tube; a connection unit connected to the first connection end and the second connection end; a robotic arm connected to the connection unit to rotate and move the connection unit multidirectionally; a suction unit connected to the connection unit by a pipeline between the connection unit and the suction unit; and a microprocessor connected to the connection unit, the robotic arm, and the suction unit, to transmit signals from one to another.