During last two decades a new technique for cleaning of surfaces has been developed. In order to understand and further improve this technique one should understand the optodynamic processes during the interaction of a laser beam with a surface. The aim of this article is to introduce a system for the detection of the optodynamic mechanisms of laser cleaning. With a comparison of measurements one can examine optodynamic mechanism and their relation with advance of process. In this article we will also present a method for online measuring of the optoacoustic signal during the laser-cleaning process. With an examination of this acoustic signal, one can follow the progress of the cleaning process and determine the relative cleanness of the surface.