Simple classroom interaction method and interaction system

The invention relates to a simple classroom interaction method and an interaction system. The interaction method is provided based on the interaction system. The interaction system comprises a projection terminal, a main control terminal and an interaction terminal. The projection terminal comprises at least one projection device which is used for projecting classroom interaction information. The main control terminal is used for operating the projection terminal to display the interaction information and interact with the interaction terminal. The interaction terminal is used for interacting with students in the classroom. In this way, problems of high price, complex connection, inconvenient use and difficulties in wide promotion of a traditional digital classroom system are solved. The interaction system is simple in structure, quick to assembly, and highly portable and movable, and can be quickly established and put into use and widely promoted and used.