To promote energy saving, many domestic products have been actively implemented energy-saving measures. Electric water heaters are one of the most common household appliances. Among them, the sales volume of electric storage tank water heaters has increased year by year, leading manufacturers to develop more low energy consumption products. In recent years, the Energy Label Promoting Team has completed the drafting of the national standard CNS 11010 for electric storage tank water heaters, and has gradually promoted the Energy Label standard and Energy Efficiency Rating labeling system for electric storage tank water heaters. In this paper, the author collects market information, difficulties in testing energy efficiency and the draft analysis of Minimum Energy Performance Standards (MEPS) to provide reference for the domestic industry and related units.