Environmental standard is a generic term for a variety of specifications formulated by relevant departments which are authorized by the law to control pollution and protect the environment. Environmental standard is not a form of law, but once quoted by laws and regulations or adopted by administrative organs, it has the legal force. The combination of the formulation and application of environmental standards helps to form a complete system of environmental standards. It is this feature that determines the binary structure of the environmental standard system. To understand this structure needs a thorough analysis of different kinds of legal relationship in the process of formulating and practicing the environmental standards and a clear understanding of the differences of different types of environmental standards in the composition of system.