The invention discloses a data processing method and device for a demonstrator. The data processing method comprises the steps of starting a demonstrator through a starting thread, wherein the starting thread is a thread used for starting the demonstrator; judging whether the started demonstrator passes verification or not; entering a main interface of the demonstrator under the condition that the demonstrator passes the verification; operating a main interface program of the demonstrator and an interface function of the main interface through a main thread to acquire task data, wherein the main thread is a thread used for operating the main interface program of the demonstrator and the interface function of the demonstrator, and the main interface program is a program used for controlling the operating state of the demonstrator; transmitting the task data to a controller system and receiving control data from the controller system through a communication thread, wherein the communication thread is a thread used for exchanging data of the demonstrator and the controller system, and the controller system is used for executing control according to the task data to acquire control data. According to the invention, an effect of expanding the application range of the demonstrator is achieved.