A mobile terminal and controlling method thereof are disclosed, by which a function adaptive to a situation can be provided by detecting a blood flow rate in a wrist having a watch type mobile terminal worn thereon. The present invention includes a display, a band configured to be worn on a wrist of a user, a sensing unit configured to measure a blood flow rate in the wrist having the band worn thereon, and a controller controlling the display to display a running screen of a prescribed function if a variation of the measured blood flow rate is generated.