Method and device for information transmission

The present invention relates to a method and device for information transmission. The method for information transmission includes: processing the data information to be transmitted, generating magnetic field data or an audio file, and generating a driving signal using the magnetic field data or the audio file, and then transmitting the magnetic field data or the audio file as a first magnetic signal using an electroacoustic transducer device driven by the drive signal. The method and device for information transmission of the present invention transmit the data with an external device using the magnetic signal transmission function of the electroacoustic transducer device in the information transmission device and/or the magnetic signal reception function of an acoustical-electrical transducer device. For the information transmission device with an electroacoustic transducer device and/or an acoustical-electrical transducer device, no modification of the hardware of the device is required; operation is easy and cost is low.