As research in various fields of biology has reached new heights in recent years, glycans have gradually attracted the attention of scientists. Many studies have shown that glycans have multiple activities, which has caused more and more relevant researchers to pay attention to the role of sugar in life and how sugar works. Glycobiology has become a hot research area in biology. It is very important to have a good tool for newcomers to glycobiology research or just entering the field. GlyCosmos, as a comprehensive and unified open portal for glycoscience, whose data is freely available to the public, provides access to glycan-related data, including the following: (1) repository; (2) various databases related to glycogen, glyco proteins, cell pathways and diseases and various visualization databases of Glycome; (3) the most advanced and unified multiple standardized polysaccharide representation methods and other functions. Although the website has only been completed in the past two years, due to the convenience, uniformity and standardized model provided by the website, it has provided a standardized database and representation method for many international glycan studies, so the website has been widely used at present. The use is also well known by glycobiologists, so this website is very helpful for newcomers to glycobiology research. This article summarizes the functions in the GlyCosmos portal, hoping to help those who intend to engage in glycobiology to better understand and use the website, which will be helpful and provide reference value for subsequent research.