A biochip detecting device for detecting a biochip which has identifying information is provided. In an example the circuit can include a current mirror, an operational amplifier adopting an N-Metal-Oxide-Semiconductor input pair structure, a band-gap output circuit, an adaptive adjustment circuit; and two branches of Bipolar Junction Transistor. The spring member is disposed near the other end part of the movable body and electrically connected with winding start and winding end of the coil. Then, the packet is processed by the elements of a decapsulation chain associated with the interface on which the packet was received, and by the elements of an encapsulation chain associated with the interface on which the packet is to be transmitted. The content data is converted into a playback format based on playback format information selected by the client machine side from the playback format list, and is sent through the communicating portion to the client machine. The contact is used to complete a first path or a second path.