Abstract 

The raising of the aging population that comes with the reduction of the workforce population is the problem that the world will have to encounter in the near future.  The measure that are applied to cope with the mentioned situation is to encourage the elderlies to continue to work and help maintain the academic growth and reduce the pension problem caused by the imbalance between the workforce populations and the retirees that keep increasing each year. For the mentioned measure is a new thing for Thai society, this article aims to reflect the theoretical point of view from the experience in western society which have entered the Aging Society before Thailand in the issue related to working after retirement to the fundamental concept in human resource management in the changing situation of the population structure and workforce in Thailand.

Keywords: Theoretical perspectives, Aging workforce, Post-retirement employment