The present disclosure discloses a method, a device, and a mobile terminal for performing automatic recording. The method comprises: obtaining content of an ongoing call; performing a recording operation on the content of the ongoing call, and saving a recording of the content of the ongoing call in a predefined region of a system ring buffer. The technical solutions provided in the present disclosure solve the problems of troublesome manual recording adjustments and excessive waste of system resources arising from recording valueless call content, thereby improving user experience.