The progress and the growth of every country often come together with the growth service business that effect to the quality of life of population in their country. For this reason, the developed country should be responsible in one important tendency in the future that is to give more importance to service business and manufacture industry. As the matters of fact, nowadays, the proportion of working age population becomes lower, meanwhile; the retired population are more and more which these phenomenon actually occur in Japan, Europe and USA. All of these are from the result of policy in each country, especially; in China, the government support one family per only one child. As the UN population statistics, we found that in next 10 years the Chinese working age population will decrease at only 53% in 2050

As the Thai Government Policy give more importance to elderly person so the industrial estate in both business and service section are encouraged to approve that be under controlled by The Industrial Estate Authority of Thailand. Particularly, The Thai Diamond City is the First Tourism Industrial Estate of Thailand due to Thailand consisted of several necessary factors to tourism and service business such as:

• Central transportation: Thailand is situated in prominent area which imparts to be center of South East Asia, included; the capacity of development into central transportation of Asia in the future as refer to the large airport which is acceptable from every international airlines
• The paradise of tropical country : There are various landscape condition in Thailand that cause the different beautiful natural scenery in each regions of Thailand, included; the sun and the warmth of tropical weather atmosphere attract many tourist to visit Thailand and let them to be fascinatingly in Thai enhancement.
• Land of smile : Thai smiling always attract many tourist around the world, Thai personnel in each career both specific skill and service skill are in high quality and plenty of service mind such as physician, nurse, Thai Chef, tourism guide, police, waiter/waitress and also receptionist in several places.
• Color of culture : Pleasing culture and Thai intellect are gathered and inherited for along time such as The knowledge about Thai herb, Thai massage which is accepted by modern medical professional that cause the Spa business, the finely craftsman whose handicrafts reflect on appliances, temples, buildings, Thai architectures as well as residences and hotels. Thai food is also one of excellent Thai culture which is popular in both tasty and cooking art, covering; the local tradition, the performance of each region, the kindness and especially, the way of life. All of these always wait for everyone coming to be touch by them through conservative tourism and home stay that the home stay is quite popular at this present time. All of these gorgeously things are like the proof of capacity in granting foreigners from all over the world.