Study guide for improvement development facilities in Public buildings To meet the policy for Universal Design. With the increasing number of people with disabilities and the elderly when combined with the population of children pregnant women or people with disabilities it was found that in the future these populations will be more inclusive. Driving the environment suitable for the disabled and the elderly It is an issue that is widely campaigned around the world. Office of the Promotion and Development of the Quality of Life of Persons with Disabilities The Ministry of Social Development and Human Security has recognized this importance. This will lead to the creation of an environment friendly to people of all ages all ages. Universal Design. It is a universal idea that the United Nations has tried to spread and promote Based on the original concept for people with disabilities to obtain living facilities in buildings and environments according to the Promotion of Non-Handicapping Physical Environment for Disabled Persons project they have been developed respectively Accessible Design Adaptable Design Barrier. Free Design which is finally accepted by the general public The principle of Universal Design that begins with the equality of the user of different ages and abilities. Can be modified Easy to use manually The interpretation is understandable. It has fault tolerances is light and has a size and space for access and use. Study guide for improvement development facilities in Public buildings To meet the policy for Universal Design. Given the importance and origins of this problem the researchers deem it appropriate to study the theoretical concepts to develop a model for improving the environment and facilities in the former public building. For equality and convenience with the assumption that the improvement model can meet the functional benefits for people of all ages who want to use various services As a guideline for creating a prototype building standard for people of all ages For interested people or agencies to apply to their own buildings.