Based on the testing equipment in electrical safety testing laboratory, this paper increased a little control instruments and data acquisition instruments and used computer programming language to develop one kind of energy testing system for electric storage water-heaters. This testing system can be flexibly set to meet the multi-standards testing requirements and to achieve the purpose of controlling the tested process, data collection, data calculation and the other functions. The testing system also can satisfy the requirements of complex testing in automated control process. The paper has made a positive research to reduce testing costs and improve testing accuracy. The testing system has been applied in practice and has provided a high efficient and low-cost solution plan for domestic and foreign laboratories which have engaged in the energy consumption testing of electric storage water-heaters.