Designed is a novel kind of optical information logic-oriented device applied in optical communication network. Applying the refractive index modulation mechanism, a multifunctional electro-optical logic gate based on polymer-base was accomplished by using the micro-ring resonator as the optical waveguide element. Multiple states of optical switch logic operations such as "and/not", "or/nor" and "xor/xnor" can be realized by changing the logical input of different ports. The working wavelength of the microring resonator was determined and the function of high speed of logic operation was verified by the static simulation. This device can be used in large-scale optical integrated circuits to realize modulation output of high speed optical signals.