A wearable action assisting device comprises an optionalcontrol unit for generating a first instruction signal for generatingpower depending on a biological potential signal in a drive source,an autonomic control unit for generating a second instruction signalfor generating power depending on a phase of a task of the wearerin the drive source, a generation unit for generating a drive currentof the drive source based on the first and second instruction signals,a display unit having a screen displaying thereon a coordinate axiscorresponding to a strength of the power, a detection unit fordetecting the coordinate of a designated position in the screen, anda setting unit for extracting parameters corresponding to thedetected coordinate from a table defining a correspondencebetween a coordinate in the screen and parameters of the signalprocessing, and for setting the extracted parameters in the optionalcontrol unit.
