External bonding of fiber reinforced polymer (FRP) plates or sheets composites has become a popular technique for strengthening concrete structures all over the world. The bond strength between FRP and concrete is a key factor controlling debonding failure of various forms in FRP-strengthened concrete structures. Based on the test data, the bond strength model of FRP-concrete was proposed using multiple linear regression and dimensional analysis, in which the effect of multiple factors on dependent was considered. Finally, the proposed model was verified through the test data, and then compared with 12 bond strength models have been found in the existing literature. The result shows that the proposed model has a better accuracy. It can be used to predict the bond strength of FRP-concrete.