1. A mobile terminal comprising: a memory; an input interface; a display; and a controller configured to: receive a voice input to input event information relating to an image through the input interface, while the image is displayed; store, in the memory, the event information relating to the image; detect an event; determine that the detected event corresponds to the event information; and display, on the display, the image related to the event information, based on the detected event corresponding to the event information, wherein the event information includes at least one of time information indicating a time point at which the image is to be displayed or location information indicating a location where the image is to be displayed, wherein the controller is configured to receive the voice input to input the event information by: receiving a first voice input to input first event information relating to a first image, wherein the first event information relating to the first image includes first time information indicating a first time point at which the first image is to be displayed, and wherein the controller is configured to display the image related to the event information by: displaying the first image based on occurrence of the first time point.