总结了光化学传感器的机理及其发展现状，特别介绍了近年来发展较快的利用表面等离子体激元共振（SPR）效应及溶胶-凝胶（sol-gel）法薄膜工艺制备的波导式、光纤式化学传感器，讨论了发展中存在的问题，提出了今后的研究方向。

The mechanism and the state-of-the-art of photochemical sensor are summarized, especially, the applications of surface plasmon resonance (SPR) and sol-gel process in photochemical sensor are introduced. High sensitivity sensors based on optical fibre and waveguide structure are discussed in detail. Furthermore, the main problems tobe solved are pointed out, and an overview of the further development is presented.