PURPOSE: To allow the formation and input of a computer program to be executed by utilizing the respectively separate brain wave states generated at the time of the specific mind operation attached with a condition as a result of training.

CONSTITUTION: A brain wave detector 9 mounted to the operator himself and the brain wave state detected by this brain wave detector 9 are displayed on a display device 2, an acoustic device 3, etc. The biofeedback training to recognize the relevancy of the specific key operations of an input device 4 at the time of data input and the brain wave state generated at this time by attaching the condition thereto is executed. The data, etc., are inputted with the computer unit 1 by the pattern matching corresponding to the respectively separate brain wave states generated by the operator via the computer program for data input specifying this relevancy in a routine operation stage.