A pain monitoring and feedback system for dental procedures includes: a sensing device for taking a picture of a patient for the muscle change detection of the patient undergoing dental procedures, a heat-sensing unit for sensing the body temperature change of the patient, and a grip force-sensing unit for measuring the grip force of the patient; and a computing device for receiving data from the sensing device and outputting a signal corresponding to pain information, a control unit for analyzing at least one of the muscle change, the body temperature change and the grip force change of the patient by using the monitoring data received via the communication unit so as to estimate the pain of the patient and outputting a pain signal or controlling a procedure device according to the estimated pain, and a memory for storing data necessary for processing the control unit.