1. A mobile terminal, comprising: a detachable stylus pen including a microphone and a memory; a touch screen configured to output an execution screen of an application; a wireless communication unit configured to receive a voice signal from the stylus pen, the voice signal generated in response to at least one voice received via the microphone while text is input onto the execution screen according to movement of the stylus pen that is detached from the mobile terminal, and the generated voice signal stored in the memory of the stylus pen such that the received at least one voice is stored as a recorded voice memo; and a controller configured to: execute the application; cause the touch screen to display text corresponding to at least a portion of the received voice signal at a specific position of the execution screen in response to selection of the specific position by the detached stylus pen; cause the touch screen to display a pop-up window including a list of a plurality of texts, each text in the list corresponding to a respective one of a plurality of voice data included in the at least one voice and one of the plurality of texts displayed distinctively over the rest of the plurality of texts in the list, such that one of the plurality of texts is selected from the list; and cause the touch screen to display a recording indicator indicating that the voice memo is being recorded, the recording indicator displayed while the text is input onto the execution screen, wherein the distinctively displayed one of the plurality of texts in the list is recommended based on the specific position for its closest relationship with the specific position among the plurality of texts in the list.