This paper focuses on embedded fiber-optic sensors used in smart composites and presents some previous academic research. It summarizes the disadvantages of embedding, the methods used to solve them, and the advantages when applied to advanced composites. Advanced composites are susceptible to the influence of molding methods, which also relates to the diagnosis of structural integrity during subsequent operation. Embedded fiber-optic sensors are expected to contribute to the life cycle monitoring of advanced composite structures and the optimization of new molding methods.