1. A mobile terminal, comprising: a voice receiving unit; a display unit; an input unit; and a controller configured to: convert the voice input received via the voice receiving unit into text; control the display unit to display the text in which a word of the text is emphatically displayed if a voice recognition rate of the word is less than a preset reference value; receive a first touch selection signal indicating an emphasized word is touch selected for correction; control the display unit to display a plurality of candidate words to replace the selected word; receive a second touch signal indicating a candidate word is selected from the plurality of candidate words; and replace the selected word with the candidate word and stop displaying the plurality of candidate words when the second touch signal is received, wherein the controller is further configured to: simultaneously display the converted text in a first direction and display the plurality of candidate words in a list in a second direction perpendicular to the first direction; display a slide bar with the selected word being positioned with respect to a first position on the slide bar; receive a touch and slide action on the slide bar; and display candidate words at different positions on the slide bar based on the touch and slide action, and wherein as the touch and slide action slides away from the position of the selected word, candidate words having a lower similarity to the selected word are displayed, and as the touch and slide action slides toward the position of the selected word, candidate words having a higher similarity to the selected words are displayed.