Abstract: OBJECTIVE To research the different types of symptoms and the rule of quantizes diagnosis. METHODS Factor analysis method was applied to study the four diagnosis methods of 408 cases with chronic prostatitis， and the factors were abstracted to measure the symptoms loaded for the clarification of the relationship between factors and symptoms. RESULTS Altogether 11 factors were chose from the four diagnosis messages， and 4 of them were found to correspond to damp-heat downing flow， stagnation of qi and stasis of blood， deficiency of liver and kidney yin， and deficiency of kidney yang symptoms， respectively. The four symptoms were weighted and the main symptoms and sub-symptoms were concluded. CONCLUSION Factor analyses provide objective evidence for the type and quantities of chronic prostatitis clinical diagnosis.