Abstract: The space environmental applicability of spacecraft materials can be improved by coatings on space hardware. The standards of coating processes are an important part of the quality assurance system for space products. This paper reviews the technique and management requirements of ECSS standards of coatings on space hardware with respect to the preparatory conditions, the procedures, the acceptance criteria and the quality assurance, as well as the features of the ECSS standards. To ensure a long life and high reliability for spacecraft in orbit, it is important to build a standardization system of coatings on space hardware based on ECSS standards.