Based on the principle of light deflection,a fibre-sensor equipment was developed for detecting the fluid-solid interface wave. And then,an experiment system was established,in which a Q-switched Nd YAG laser was applied to excite the fluid-solid interface wave. The interface waves,which were induced by laser at the air-aluminum,water-aluminum,and alcohol-aluminum interfaces,were experimentally detected.The velocity of Leaky Rayleigh wave and Scholte wave on the three interfaces derived from the wave profiles,were 2889 m/s and 339 m/s,2916 m/s and 1512 m/s,2872 m/s and 1184 m/s respectively.Compared with theoretical value,the relative deviation was less than 5%.