Provided is a business model based on multi-level application widgets and a system thereof, including: embedding, by a server, intended application widgets in an Internet platform equipped with a software application programming interface; providing a business protocol between an end user and the server, thus giving the end user authority to embed data sets in the application widgets and to conduct display, operation, sales, and real-time interaction within the same window; determining, by the end users, whether at least an application widget or a data set is to be embedded in each of the data sets again, so as to finalize the multi-level application widgets. Accordingly, the end user enhances promotion and thereby expands business on the Internet platform at the server.