A fourth-order microring resonator structure was designed based on quantum coherence effects of electromagnetic induced transparency. Coupled-resonator-induced-transparency phenomenon which produced in resonator was analyzed theoretically. Key parameters of structures were simulated by Finite Difference Time Domain Method and Beam Propagation Method. The ring resonators were fabricated with electron beam lithography and the induction coupled plasma etching process. The structure was tested by vertical grating coupling method , the results show that a narrow transparent peak was obtained which is caused by interference due to phase elimination. Optical transmission delay is realized by two transmission peaks which are generated from mutual interference among ring resonators and one of the transmission spectrum full width at half maximum is 0.022 nm. This structure can achieve high quality factor (Q=0.72×105), and the distance between the two resonance peaks separated by 0.084 nm. The through port and drop port transmission spectra are coincided well with each other which excellent agree with the theoretical analysis.