This paper provides evidence for intonation accommodation by analyzing the production and perception of speakers from Jeonnam region in Korea. In the production experiment, I examined the f0 patterns of the Accentual Phrases(AP) that vary in syllable numbers and the AP-initial tone types produced by twenty-one speakers from Gwangju and seven from Seoul. Three results were found from the production experiment. First, the acoustic properties used by young Gwangju female speakers are the most similar to those used by Seoul speakers. Second, the degree of AP-final pitch rising and AP-initial pitch rising was found to be greater for Seoul speakers than for Gwangju speakers. Third, intonation accommodation was found to be more difficult for interrogatives than for statements. In the perception experiment, the stimulus materials taken from the production experiment were assessed using a seven-scale forced-choice categorization task by 38 raters. The results from the perception experiment are three-fold. First, the rate of intonation accommodation of the Seoul dialect by Gwangju speakers was higher in the order of young female Gwangju speakers>young male Gwangju speakers>old Gwangju speakers. Second, the AP-final pitch rising is most predictive of intonation accommodation. Third, the AP-initial tone can also influence the perception of intonation accommodation. Findings from this study shed light on the issues related to the development of intonation accommodation among dialects.