Adda(Thailand) Public Company Limited Information System By the function of the system following the system can increase the ability of trading. Customers can contact trading quickly and easily. By Adda(Thailand) Public Company Limited Information System consists of the part of the user and the administrator. The system has the security of the data. To prevent unauthorized users to use in the system. According to the objectives of the results that is system can facilitate buyers can place orders through the site at any time. Add channel sales make buyers more choice. Easy to understand. To learn the performance of a system is simple and fast and can increase the business opportunities as well.