The invention relates to a computer real-time analysis system for singing and playing, comprising a segmental package-inspection device of an acoustical signal, a real-time recording, storing, displaying and playing device of acoustical signal time-domain data, a device for drawing time-frequency-intensity joint picture with fast Fourier transform for a short time, a device for drawing time-frequency real-time spectrum with fast Fourier transform for a short time, a device for recognizing fundamental tone, harmonic tone and resonance peak of sound, analysis processing and displaying, a devicefor rhythm recognition of the sound, analysis processing and displaying, a device for analyzing and sorting-out into an opern and displaying according to the information such as fundamental tone, libretto, rhythm and tuning systems; and a device for modifying, recording, storing, evaluating, displaying, playing and transmitting an acoustical time-domain and frequency-domain signal. The system carries out computer real-time visualization and systematical and quantitative measurement and test to vocal music and instrumental music, and sing state and playing state can be recognized and guided byadopting the computer image and video automatic recognition technology.