Aiming at the most common and reliable way of packaging-embedded packaging,theoretical and experimental studies on standard packaging design are conducted. Through the analysis of boundary conditions and deformation compatibility conditions of established optical fiber strain transferring analytical model as well as existing main strain transferring characteristic equations,a determined strain transferring characteristic equation is developed,and thus an universal strain transferring relationship is established,which may serve as a basic theoretical model for standard embedded fiber Bragg grating (FBG) packaged structure design. The tested results of packaged models show that strain transferring relationship sestablished according to classic shear lag theory and Ansari′s fiber optical strain transferring analytical model are more reliable for packaged structures containing relative low modulus adhesive materials.