Epinephelus fasciatus, a small grouper, is characterized by its delicious meat and high market value. This study utilized collected wild parents of red grouper to conduct artificial breeding, embryonic and post embryonic development, and juvenile fish cultivation research under industrialized conditions in northern China. At present, there are no reports on the artificial breeding, embryonic and post embryonic development, and feed conversion process of E. fasciatus under local factory conditions in China. This study focuses on the fertilized eggs and juvenile fish of E. fasciatus artificially bred in factories, and observes and records their embryonic development and abnormal growth. The relationship between juvenile fish development and feed conversion is studied, providing scientific reference for the industrial breeding and aquaculture of E. fasciatus, as well as high-value utilization.