Abstract. Assessment of pavement working state and service life is really meaningful for traffic security, design evaluation and road maintenance. However, this job seems to be a mission impossible, because it is unimaginable to learn exactly how a pavement works inside when the construction is finished. As a result, in this paper, current situation of pavement-design theory and testing methods was summarized, and at the same time the concept of Pavement Structural Health Monitoring (PSHM) was introduced, followed by the explanation of the FBG sensing component's basic theory. Then, an engineering application of utilizing FBG sensors in actual pavement was introduced, the monitoring effect was shown. Conclusions were that PSHM was of great importance and utilizing FBG sensors in PSHM was effective.

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