A wearable mobile terminal comprising: a display; a sensing unit configured to measure a blood flow rate at a wrist of a user wearing the wearable mobile terminal; and a controller configured to: cause the display to display a screen corresponding to a first function when a variation of the measured blood flow rate meets or exceeds a first threshold value; and cause the display to display a screen corresponding to a second function that is different than the first function when the variation of the measured blood flow rate meets or exceeds a second threshold value, characterized in that the controller is further configured to: execute the first function when a state of fingers of the user is varied from a completely unfolded state to a fist state, execute the second function when the state of fingers of the user is varied from the fist state to the completely unfolded state, wherein the state of fingers of the user is determined based on the variation of the measured blood flow rate, determine whether an activity state of the user is an exercising state based on the measured blood flow rate, and cause the display to sequentially display a plurality of identified items included in exercise summary information when the activity state of the user is the exercising state and the state of fingers of the user is the fist state, wherein the plurality of identified items include a blood pressure information, an exercise schedule information and a heart rate information. a display; a sensing unit configured to measure a blood flow rate at a wrist of a user wearing the wearable mobile terminal; and a controller configured to: cause the display to display a screen corresponding to a first function when a variation of the measured blood flow rate meets or exceeds a first threshold value; and cause the display to display a screen corresponding to a second function that is different than the first function when the variation of the measured blood flow rate meets or exceeds a second threshold value, characterized in that the controller is further configured to: execute the first function when a state of fingers of the user is varied from a completely unfolded state to a fist state, execute the second function when the state of fingers of the user is varied from the fist state to the completely unfolded state, wherein the state of fingers of the user is determined based on the variation of the measured blood flow rate, determine whether an activity state of the user is an exercising state based on the measured blood flow rate, and cause the display to sequentially display a plurality of identified items included in exercise summary information when the activity state of the user is the exercising state and the state of fingers of the user is the fist state, wherein the plurality of identified items include a blood pressure information, an exercise schedule information and a heart rate information. cause the display to display a screen corresponding to a first function when a variation of the measured blood flow rate meets or exceeds a first threshold value; and cause the display to display a screen corresponding to a second function that is different than the first function when the variation of the measured blood flow rate meets or exceeds a second threshold value, characterized in that the controller is further configured to: execute the first function when a state of fingers of the user is varied from a completely unfolded state to a fist state, execute the second function when the state of fingers of the user is varied from the fist state to the completely unfolded state, wherein the state of fingers of the user is determined based on the variation of the measured blood flow rate, determine whether an activity state of the user is an exercising state based on the measured blood flow rate, and cause the display to sequentially display a plurality of identified items included in exercise summary information when the activity state of the user is the exercising state and the state of fingers of the user is the fist state, wherein the plurality of identified items include a blood pressure information, an exercise schedule information and a heart rate information. execute the first function when a state of fingers of the user is varied from a completely unfolded state to a fist state, execute the second function when the state of fingers of the user is varied from the fist state to the completely unfolded state, wherein the state of fingers of the user is determined based on the variation of the measured blood flow rate, determine whether an activity state of the user is an exercising state based on the measured blood flow rate, and cause the display to sequentially display a plurality of identified items included in exercise summary information when the activity state of the user is the exercising state and the state of fingers of the user is the fist state, wherein the plurality of identified items include a blood pressure information, an exercise schedule information and a heart rate information.