The temperature and internal strain are most important factors, affecting the curing processing and
structure properties of composites. The double fiber Bragg grating (FBG) sensors were embedded in the prepreg glass fiber/ epoxy laminate composite structure to monitor the variable of temperature,viscosity and internal strain in the hot-press curing processing and briefly analyze the residual strain after curing. The experiments indicate that the FBG sensors can monitor the temperature and internal strain in the curing processing of composites and provide a basis for intelligent curing control. Once the composite is cured, the same sensor can be used to provide the information about the mechanical/ temperature changes in the performance of structure.