It is clear that between 1920 and 2019, three lines of household electrical products had a developing trend. Only refrigerator market share was zero in 1920, while the proportion of washing machine was about 40% and the vacuum cleaner was nearly 30%, both of percentages in families had a similar amount. Meanwhile, since 2000, the development tendency of refrigerator and vacuum cleaner in the same boat, which were becoming 100% occupying in every family.