A hypnotic system includes a physiological parameter detection device, an audio information comparison device, a communication device and an audio device. The physiological parameter detection device detects the physiological parameter of a user for generating a physiological parameter signal. The audio information comparison device receives the physiological parameter signal, locates a respective audio information from an internal audio-comparing table, and then generates a corresponding audio signal for transmitting to the communication device. The audio device receives the audio signal forwarded by the communication device and then plays the corresponding audio information matching users physiological parameter so as to serve a hypnotic purpose to the user.
