In this study, the Weibull parameters (shape parameter and mean lifetime) for lifetime distributions of electronic devices in Vietnam have been estimated based on the previous questionnaire researches by us. The mean lifetimes for four appliances were drastically decreased in seven years and lifetimes in Hanoi and Ho Chi Minh City were almost same, excluding TV. That is, the mean lifetime of TV in Hanoi and Ho Chi Minh City was found to be3.5 years and 7.6 years, respectively. The lifetimes for refrigerator, washing machine and air conditioner were estimated to be 4.2～4.7 years, 3.9～4.6 years and 4.7～5.0 years, respectively.
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