Commonly used mechanical equipment for measuring displacement and strain, such as linear variable differential transducers (LVDTs) and strain gauges which should be placed on the specimens by contact, have limitations such as high cost of measuring, difficulty in set up, time consuming installation and impossibility of collecting the displacement and strain values over the entire length of specimens. These limitations have led researchers to develop non-contact full field deformation measurement techniques, namely image-processing. Particle Image velocimetry (PIV) is one of these methods which is more accurate than other methods. In this paper, by introducing the PIV method and its previous applications for the experimental testing in structural laboratory, the accuracy of this method for measuring was studied. Additionally, a number of specimens (FRP strips bonded to concrete blocks) were prepared and subjected to single shear pull testing, and the load-displacement curves of the specimens were obtained using LVDT and PIV analysis and compared. Based on the results of this study, the PIV method can be a precise and low-cost method for measuring displacement and strain in structural engineering experiments.