Abstract: The translucent egg is an egg with some visible dark or light brown spots on the surface of eggshell. The spot is mainly caused by water penetration and accumulation of egg contents in the eggshell, which is closely related to the decreasing quality of eggshell and external environment factors such as high temperature, high humidity and microbial activities. This article summarized the formation and influencing factors of eggshell dark spots, which included shell structure, temperature, humidity, microbes, storage time and other environmental factors. Moreover, the article concluded the change of egg quality with the formation of dark spots, so as to further understand the formation, changing rules and influencing factors of translucent egg, reduce the formation of dark spots, maintain the freshness of eggs, and reduce the negative impact of translucent eggs.