Standardization is the key measure to solve the "difficult identification" for environmental damage, and an important sign that environmental damage identification and assessment is becoming independent. The assessment of agricultural environmental damage, which is the earliest start, the largest demand and faster growth branch of standard system, has stepped into the rudiment stage. This paper puts forward the principles and positions of standardization construction, and constructs a standard system framework based on the comparison of national and international standards and demand analysis. We propose that the standard system of agricultural environmental damage appraisal in China should:(1) Taking the damage receptors as the ordinate and the technical processes as the abscissa; (2) Centering on the damage identification, causality determination and loss assessment, the main content should involve the following technical requirements, i.e., the damage identification, symptom diagnosis, damage traceability, monitoring and detection methods, loss quantification of ecosystem, and the norms of agricultural products and agricultural environmental elements; (3) Being a system composed of basic standards, technical guidelines, technical specifications, and technical manuals.