This standard specifies the basic requirements, evaluation methods and test methods for the economic operation of AC electric drive fan (including pumps and air compressors) systems. It is suitable for the economic operation evaluation of existing systems, and also provides reference for the design of new systems. The standard covers the energy efficiency of the system, the calculation of economic benefits of energy saving measures, etc., aiming to improve the operation economy of the system. A number of relevant standards are quoted, such as GB/T 12497 (Economic Operation of Electric Motors) and GB 19761 (Energy Efficiency of Centrifugal Pumps), etc., to ensure the comprehensiveness and accuracy of economic operation.