Porphyra is the highest economic-value seaweed in the world at present.Porphyra completes the life history and propagates its offspring by different reproduction fashions.Asexual reproduction and sexual reproduction are the two main reproduction fashions in Porphyra.Monogony is a special kind of sexual reproduction.The diversity of reproduction fashion decides the diversity of life history,which is a different response to different environment during the evolution.The study on genetic basis of Porphyra is very important to its breeding exploitation,including the reproduction and life history,which are controlled by gene.The status quo of studies on the reproduction and life history of Porphyra and the unsolved problems are discussed in this paper,which can provide references to further study and application.