The purpose of this study was to examine the effect of gender on Koreans' English vowel perception and production process in speech accommodation. The experimental analyses are composed of perception experiment (AXB test) and imitation production experiment (relative distance in relative vowel characteristics) for 24 college students with the Praat program and statistical program (R). The experimental data of perception-production was analyzed with the frequency and t-test analysis to identify the effect of gender on speech accommodation. As a result, there was no difference in the perception abilities of males and females in the perception experiment; whereas the male participants showed a stronger 'convergence' of speech accommodation than the female participants in the imitation production experiment. It could be potentially implied that the result of the findings is associated with perception limitations (the difference between the two language structures of Korean-English in terms of phonology and phonetics) and the influence of social factors (social-cultural norms psychology influences the linguistic characteristics of gender).