A mobile terminal including an input unit configured to receive an input to activate a voice recognition function on the mobile terminal and a memory configured to store multiple domains related to menus and operations of the mobile terminal. It further includes a controller configured to access a specific domain among the multiple domains included in the memory based on the received input to activate the voice recognition function, to recognize user speech based on a language model and an acoustic model of the accessed domain, and to determine at least one menu and operation of the mobile terminal based on the accessed specific domain and the recognized user speech.