An interactive device for an internet radio station comprising a content presentation unit and a content selection unit, wherein the content selection unit comprises a knob, a selection module physically connected with the knob, a processing module electrically connected with the selection module, an indication module of a physical shape physically connected with the knob, and a communication module electrically connected with the processing module; wherein, the knob is configured to input a channel selection instruction when manually rotated by a user; the selection module is configured to generate a corresponding electrical signal according to the channel selection instruction; the processing module is linked to a network radio station by the communication module, and configured to obtain, according to the electrical signal, a corresponding audio resource from the network radio station and release the corresponding audio resource to the content presentation unit; the content presentation unit is configured to play the audio resource; and the indication module is configured to generate, under a driving of the knob, a state change corresponding to the channel selection instruction; characterised in that, the selection module comprises a rotary potentiometer, wherein the knob is physically connected with a rotary shaft of the rotary potentiometer through a contact module; wherein when the knob is rotated by the user to input the channel selection instruction, the knob is configured to bring the rotary shaft of the rotary potentiometer to rotate through the contact module, such that the rotary potentiometer is configured to generate the electrical signal corresponding to the channel selection instruction; the indication module comprises a pull wire, a pointer connected with the pull wire, and a dial arranged along the pull wire; wherein the dial comprises a plurality of scale values corresponding to a plurality of different audio resources one by one, the contact module comprises a first pull wire wheel connecting with the rotary shaft of the rotary potentiometer, wherein the first pull wire wheel and the knob are winded by the pull wire, respectively; wherein when the knob is rotated by the user to input the channel selection instruction, the knob is configured to drive the pull wire to walk a certain track, so that the first pull wire wheel is configured to bring the rotary shaft of the rotary potentiometer to rotate correspondingly for generating the electrical signal corresponding to the channel selection instruction; the pointer is configured to move along the dial with the pull wire and align with the scale value corresponding to the audio resource. the selection module comprises a rotary potentiometer, wherein the knob is physically connected with a rotary shaft of the rotary potentiometer through a contact module; wherein when the knob is rotated by the user to input the channel selection instruction, the knob is configured to bring the rotary shaft of the rotary potentiometer to rotate through the contact module, such that the rotary potentiometer is configured to generate the electrical signal corresponding to the channel selection instruction; the indication module comprises a pull wire, a pointer connected with the pull wire, and a dial arranged along the pull wire; wherein the dial comprises a plurality of scale values corresponding to a plurality of different audio resources one by one, the contact module comprises a first pull wire wheel connecting with the rotary shaft of the rotary potentiometer, wherein the first pull wire wheel and the knob are winded by the pull wire, respectively; wherein when the knob is rotated by the user to input the channel selection instruction, the knob is configured to drive the pull wire to walk a certain track, so that the first pull wire wheel is configured to bring the rotary shaft of the rotary potentiometer to rotate correspondingly for generating the electrical signal corresponding to the channel selection instruction; the pointer is configured to move along the dial with the pull wire and align with the scale value corresponding to the audio resource.