This invention provides a system and a method for online, web-based point of sale (POS) building and configuration, which can assist non-expert business operators in building, editing and testing a point of sale system to manage their businesses. The business operations range from a single branch to a large chain of stores or branches. The key advantages of the Web-based POS builder are that it is completely built on the foundation of the Web. The POS builder is accessible anywhere in the world. It can be used by a person of any skill level. The POS builder builds, edits, and tests new POS terminals in real time.