European Journal of Molecular & Clinical Medicine ISSN 2515-8260 Volume 08, Issue 03, 2021 73 The Quality of Life (QOL) Development for Thai Elderly in Nakhon Pathom Province, Thailand Bunyaporn Phoothong College of Logistics and Supply Chain Suan Sunandha Rajabhat University 1 U-thong Nok Road, Dusit, Bangkok 10300 Thailand Chitpong Ayasanond College of Logistics and Supply Chain Suan Sunandha Rajabhat University 1 U-thong Nok Road, Dusit, Bangkok 10300 Thailand Wiriya Boonmalert College of Logistics and Supply Chain Suan Sunandha Rajabhat University 1 U-thong Nok Road, Dusit, Bangkok 10300 Thailand Thun Chaitorn College of Logistics and Supply Chain Suan Sunandha Rajabhat University 1 U-thong Nok Road, Dusit, Bangkok 10300 Thailand Corresponding Author: bunyaporn.po@ssru.ac,th Abstract- This research aims to 1) study the quality of life (QOL) level development according to characteristics of Thai elderly demography 2) study the different levels of Thai elderly QOL and 3) study the relationship between QOL development and Thai elderly QOL in Nakhon Pathom province. Mixed methods research was used in this study. The sample consisted of 400 Thai elderly by using questionnaires and statistics used. The data analyzed were frequency, percentage, mean, standard deviation. The statistical t-test, one-way ANOVA analysis, and Pearson's Correlation Coefficient were determined. Found that 1) the QOL improvement, the overall picture is at a high level, social support had the highest average, followed by environmental management, participation and health promotion 2) the elderly QOL, the environment was at a high level, followed by social, psychological, and physical relationships 3) overall QOL improvement was positively related to the elderly QOL according to the statistical significance assumptions at the level. 01 and 4) from the municipal administrators of Nakhon Pathom province interviewing, found that the QOL improvement in various areas municipality affecting the elderly QOL when the elderly are developed, they will have a better QOL. Keywords - Quality of life, Thai Elderly, Nakhon Pathom I.INTRODUCTION From the changing of the population structure into an aging society, it is a fact that many countries around the world are paying attention to this matter. Population aging is impacting all aspects of society, including labor markets [1, 2]. The decrease in the number of labor that may affect economic growth due to the labor force is an inverted triangle. That is, the number of labor force entering the labor market is reduced while there are many more elderly entering societies. In 2020, there are an estimated 727 million elderly aged 65 years or over. This number is projected to more than double by 2050, reaching over 1.5 billion persons. The elderly in the global population is expected to increase from 9.3 percent in 2020 to 16.0 percent in 2050 [3]. The United Nations has divided the levels of