The Wuping Hakka dialect explored in this paper refers to the Hakka dialect spoken by the native Lian family at Shimen Village in Taipei. The main phonetic features of this dialect are examined based on the investigation with the main speaker, Madam Lian Chai. Extensive comparison also has been made with other Hakka dialects which include Toufen, Liudui, Zhudong, Xinwu,Yongting, Raoping, Dongshi, Zhao'an, Changle etc. From the observation, interesting phonological and lexical variations are found in the dialect and they are due to the influence of the commonly used Southern Min dialect as well as Mandarin after a long period of language contact. Several examples have been concluded from these variations in order to give a clearer picture on how the phonetic changes took place.