The present invention relates to an electrode system (1) comprising:- at least one flexible band (11)；- at least one movable electrode module (13) having at least one degree of freedom with reference to said at least one flexible band (11) and positionable at different locations on the at least one flexible band (11)；- at least one conductive cable connected to the at least one electrode module (13)； and- at least one electrode configured to fit in one movable electrode module (13), to be connected with the at least one conductive cable and to detect at least one bio-signal.
