Information interaction system and information interaction method

The invention relates to an information interaction system and an information interaction method. The system comprises a server (10), a master control terminal (20) and a plurality of controlled terminals (30), wherein the server (10) can be connected to a communication network through a network module; the master control terminal (20) can be connected to the communication network, communicates with the server (10) and transmits control signals to the controlled terminals (30); the controlled terminals (30) can be connected to the communication network, communicate with the server (10) and receive the control signals, which are forwarded by the server (10), from the master control terminal (20); and the controlled terminals (30) comprise input modules which can receive the input of a user and transmit the input of the user to the master control terminal (20) through the server (10). The information interaction system is particularly applied to the field of teaching, and the master control terminal for a teacher and the controlled terminals for the students can be interacted in a bidirectional mode.