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A typical application of FBG(Fiber Bragg Grating) sensors system is realized on the bridge, and vibration signal of points on the bridge is acquired by them, and data is processed by wavelet analysis method, EMD(Experience Mode Decomposing) method, and EEMD(Ensemble Empirical Mode Decomposition) method to lower its noise component of the original signal and show its own dynamic characters. Power spectrum, SNR and curve diagram show that EEMD is best among them for signal denoising. Not only stationary character of the signal is kept, but also it has the highest SNR. [ABSTRACT FROM PUBLISHER]