The discussion and research on the quality of life (QOL) has been continued over twenty years and many excellent minds are involved. Undoubtedly, the research on QOL is crucial not only because it can provide useful information for policymakers and inform future choices that people make but also for enhancing QOL has been an implicit goal for individual, communities and world. However, the accurate assessment of QOL is problematic and relatively difficult as QOL is the product of social construction and almost affected by all the factors that exist in society. This leads to a result that it is difficult to give QOL a so-called standard definition. Moreover, its definition varies according to its measurement method and each method provides a different angle to think QOL. This essay through the evaluation of different measurement methods of QOL argues that the existing three main measurement methods reveal a part of QOL respectively and to obtain a more complete, accurate and meaningful QOL picture, thereby combining various measurement methods is necessary. First, the three measurement methods and their strengths