CAI Monitoring System processes the brain’s electrical activity based on original signal processing technology. It helps not only patient to be balanced-sedated but also hospital to use the minimum possible amount of drug. It makes it possible to monitor real-time depth of anesthesia in an operation room. CAI Monitoring System consists of a sensor that detects the patient’s brainwaves, an amplifier that intensifies the brainwaves signal and a monitor that digitalizes signals and display its index.