A terahertz field effect non-invasive biofeedback diagnosis system comprises a trigger sensor, a terahertz wave source field unit, and a central processing & telemetry unit. The central processing and telemetry unit (CP&T) is used to generate different types of stimulus signals to patients and system operation units. The biofeedback diagnosis system is used to form two biofeedback loops: one loop is through a CP&T-patient-trigger sensor loop and the other loop is through a CP&T-operation unit-trigger sensor loop. The trigger sensor can remotely obtain the biofeedback signal of the patient, and process the feedback signal into a digital signal and send it back to the central processing and telemetry unit. In order to improve the feedback signal of patients, the terahertz wave source field unit is placed near the patient, so as to trigger the feedback signals of biological cells, tissues, organs and brain waves of patients for diagnosis.