Abstract: Prompt Gamma Neutron Activation Analysis (PGNAA) is one of the nondestructive and On-line measurement of nuclear analytical methods, There are more than 30 PGNAA laboratories which are established based on the research reactor currently. The basic principle and the application field of three kinds of analytical method of PGNAA were introduced, such as the relative comparison method、calibration method、k₀ factor method. The short life nuclides is proposed using the beam chopper technique in order to improve the measurement accuracy. The internal standard method was proposed for that large sample neutron measurement that brings self absorption and gamma-ray self shielding effect. The PGNAA system was introduced at CARR. It provides methodology reference to establish the prompt gamma activation analysis on the base of CARR for our country.