Abstract: An energy saving method for pond mechanical aeration was proposed based on oxygen mass transfer theory through experiments and analyses of different pond mechanical aeration patterns. With the method, an average 4% energy-saving was achieved for the existing pond mechanical aeration equipments by changing the operation control status and method. Furthermore, combined with use of water layer exchange machine for substitution of aerator at some time, it can save 29.2% of total energy consumption, compared with traditional operation mode of aerator. The results can provide a reference for application of pond mechanical aeration and development of intelligentized aeration research.