A multifunctional torque tool detection device includes at least one connection body, at least one tool joint bar, at least one signal ring assembly, a toque detection device, an angle sensor, a plurality of signal pick-up elements, and a displaying and processing unit. The connection body has an end coupled to the tool joint bar, and the tool joint bar is connected to at least one tool bit. The connection body is encased in a tool casing. The signal ring assembly is coupled between the connection body and the tool joint bar. The toque detection device and the angle sensor are attached to the connection body so that the toque detection device and the angle sensor respectively detect a torque value and an angle value applied by the tool bit in a clockwise or counterclockwise rotation operation, and generate a torque detection signal and an angle detection signal that are supplied through the signal ring assembly. The signal pick-up elements are set in contact with the signal ring assembly to pick up the torque detection signal and the angle detection signal during the rotation of the connection body. The displaying and processing unit is connected to the signal pick-up elements to receive the torque detection signal and the angle detection signal and display an actual torque and angle that the tool bit applies in an operation thereof.