An embodiment of the invention discloses a charging prompting method, belongs to the technical field of communication, and applied to a charging line. A radio-frequency module and a prompting module are built in the charging line; the charging prompting method comprises the steps that the charging line receives a charging prompting control signal transmitted by a mobile terminal through the radio-frequency module; and position prompting information is output through the prompting module according to the charging prompting control signal, wherein the position prompting information is used for prompting the position of the charging line. The invention also discloses the charging prompting method applied to the mobile terminal. The invention also discloses the charging line, the mobile terminal and a computer readable storage medium; and when the mobile terminal is low in electric quantity, the position of the charging line can be determined.