An electronic device, comprising: a touchscreen configured to receive touch inputs; a microphone configured to receive sounds; a memory unit configured to store data; and a control unit, configured to: in response to activation of a multiple recording function, provide on the touchscreen a memo writing screen including a memo zone in which touch inputs to the touchscreen are displayed visually as memo data, and a voice recording icon selectable to activate voice recording functions, in response to detecting selection of the voice recording icon, activate a first voice recording function to record voice recording data through the microphone, after the voice recording is completed, display a voice recording display zone representing a completed audio memo on the memo writing screen, if a first touch input begins in the memo zone outside of the voice recording display zone and passes through the voice recording display zone, generate additional memo data for display, corresponding to the first touch input, the additional memo data including a portion overlapping the displayed voice recording display zone such that the portion is visible over a part of the displayed voice recording display zone, if a second touch input is received in the memo zone inside the voice recording display zone for selecting the voice recording display zone, apply a visual effect of highlighting the voice recording display zone to indicate selection of the voice recording display zone, in response to an input for the memo writing screen being closed, store multiple recording data including the memo data, the completed audio memo, and the additional memo data, and display a thumbnail image, converted from the stored multiple recording data, on the touchscreen, wherein the thumbnail image includes an image corresponding to the stored multiple recording data. a touchscreen configured to receive touch inputs; a microphone configured to receive sounds; a memory unit configured to store data; and a control unit, configured to: in response to activation of a multiple recording function, provide on the touchscreen a memo writing screen including a memo zone in which touch inputs to the touchscreen are displayed visually as memo data, and a voice recording icon selectable to activate voice recording functions, in response to detecting selection of the voice recording icon, activate a first voice recording function to record voice recording data through the microphone, after the voice recording is completed, display a voice recording display zone representing a completed audio memo on the memo writing screen, if a first touch input begins in the memo zone outside of the voice recording display zone and passes through the voice recording display zone, generate additional memo data for display, corresponding to the first touch input, the additional memo data including a portion overlapping the displayed voice recording display zone such that the portion is visible over a part of the displayed voice recording display zone, if a second touch input is received in the memo zone inside the voice recording display zone for selecting the voice recording display zone, apply a visual effect of highlighting the voice recording display zone to indicate selection of the voice recording display zone, in response to an input for the memo writing screen being closed, store multiple recording data including the memo data, the completed audio memo, and in response to activation of a multiple recording function, provide on the touchscreen a memo writing screen including a memo zone in which touch inputs to the touchscreen are displayed visually as memo data, and a voice recording icon selectable to activate voice recording functions, in response to detecting selection of the voice recording icon, activate a first voice recording function to record voice recording data through the microphone, after the voice recording is completed, display a voice recording display zone representing a completed audio memo on the memo writing screen, if a first touch input begins in the memo zone outside of the voice recording display zone and passes through the voice recording display zone, generate additional memo data for display, corresponding to the first touch input, the additional memo data including a portion overlapping the displayed voice recording display zone such that the portion is visible over a part of the displayed voice recording display zone, if a second touch input is received in the memo zone inside the voice recording display zone for selecting the voice recording display zone, apply a visual effect of highlighting the voice recording display zone to indicate selection of the voice recording display zone, in response to an input for the memo writing screen being closed, store multiple recording data including the memo data, the completed audio memo, and the additional memo data, and display a thumbnail image, converted from the stored multiple recording data, on the touchscreen, wherein the thumbnail image includes an image corresponding to the stored multiple recording data. display a thumbnail image, converted from the stored multiple recording data, on the touchscreen, wherein the thumbnail image includes an image corresponding to the stored multiple recording data.