Plants emit volatile blends that may be quantitatively or qualitatively different in response to attackers by different herbivores. Plants that are infested by herbivores emit volatile cues that can be used by the natural enemies of the herbivores in their search for hosts. Volatiles played a vital role in their host-finding behaviour. Cotesia glomerata is one of the major parasitoids wasps attacking larvae of pieris rapae and its application in biological control is promising, Knowledge of its chemical ecology is limited. This paper addresses the question which of these healthy plant and host larvae-damaged plant volatiles are perceived by the two geographic races of parasitoid species. By mean of electroantennogram (EAG) and Y-tube olfactometer techniques, the difference between the electrophysiological and learning behavior of two geographic races of female wasps to volatiles of cabbage treated differently were compared, one race originated from Beijing in China and the other from Wageningen in the Netherlands. The tests from Y-tube olfactometer showed that different attractive actions were detected in healthy plant and host larvae-damaged plant of two geographic races of female wasps with no learning experience, different learning experience of female wasps influenced their preference to volatiles of experienced host plant. No experiences female adult of Beijing race showed significantly preference to volatiles of host larvae-damaged cabbage (Brassia oleracea L. var. capitata) than host larvae-damaged red cabbage or collard, and the no learning experiences female adult of the Netherlands race showed same significantly preference with Beijing race of host larvae-damaged cabbage. The female adult of Beijing race with 3 oviposition experiences and 3 odors on red cabbage or collard with 10 minutes interval showed significantly preference to volatiles from the host plant that was experienced. The female adult of the Netherlands race with 3 odor experiences on red cabbage or collard infested by p.rapae disclosed the obvious taxis to the experienced volatiles. Three different chemical volatiles of cabbage (Brassia oleracea L. var. capitata),the EAG responses of female wasps of two geographical races to 6-carbon compounds was the strongest, followed by aliphatic compounds and terpenoid at the concentation of 10^-1 mol/L. EAG response values of either Beijing race and Wageningen race positively correlated the dosages from 10^-4 mol/L to 10^-1 mol/L of trans -2-Hexenal and Hexylacetate, as well as from 10^-4 mol/L to 10^-2 mol/L of Nonanal, Myceneis and Linaloor. Moreover, no significant difference between two races were detected. In conclusion, our data show that the both races possess the similar learning ability and the consistent electrophysiological response characteristics. Our results indicate that the cabbage caterpillar may use cabbage volatiles as kairomone to find their optimal hosts, wasps show an increase in flight response to a previously host plant after learning experience on that plant. The experimental results provided a scientific basis for the theoretical study on the biological control of pieris rapae.