A control method for an ion-exchange polymer metal composite and a system thereof belong to the field of intelligent material control; the method comprises the following steps: (1) an excitation signal sin(k) is transmitted to a controller; after the superposition calculation of control parameters wi and ri of the controller with a plurality of backlash modules is carried out, an actual output signal y(k) is output and obtained; (2) the actual output signal y(k) is amplified by an amplifying circuit, and a response signal dn(k) is obtained by exciting the ion-exchange polymer metal composite and then fed back to an online identification module by a displacement sensor; after the superposition calculation of the weight wi(k) of the online identification module with a plurality of backlash modules in the online identification module is carried out, an output signal yn(k) is output and obtained; and then the identification parameters-weight wi(k) and ri are substituted in the controller after an inversion; and (3) an image comprising the excitation signal sin(k) and the response signal dn(k) is output. The invention has simple structure, low cost, and short test cycle.