Voluntary Energy Conservation Label for dehumidifiers is the first step for energy efficiency management in Taiwan since 2001. There are two mandatory energy measures of dehumidifiers promoted in recent years in Taiwan, including the energy efficiency rating labelling and the minimum energy performance standard (MEPS) in 2011 which have far-reaching impact on the local dehumidifier industry. Following the updated marketing information and database of energy efficiency labeling system, this study focuses on the energy efficiency management promoting benefits for domestic dehumidifiers in Taiwan, and also provides the research results of the energy efficiency rating benchmarking which includes the impacted evaluation of rating difference for the future research in the associated field for energy, refrigeration and air-conditioning in Taiwan.