Method and device for achieving electrical energy collection and communication by using electronic equipment audio frequency interface

The invention relates to a method for achieving electrical energy collection and communication by using an electronic equipment audio frequency interface. The method is characterized in that signals output by an audio frequency interface and modulated by constant envoloping modulation technology are enabled to achieve energy supply and information interaction to an external access device through an AC- DC rectifier and an information detector. That double energy is collected from two sound channels of the audio frequency interface and signal transmission is performed can be achieved.