Contemporary Christian worship takes many forms, a fact that has triggered a series of theological debates over the nature of congregational singing. Will congregational singing fade away from church worship because contemporary Christian songs are considered unfamiliar and hard to learn? What is the purpose for the congregation to sing together in church worship? In this paper, I argue from a Wesleyan perspective for the theological significance of congregational singing in the Protestant church worship setting. To do so, I employ a qualitative research method to examine the theological idea of John Wesley (1703-1791) whose ideas are mainly found in his central work A Collection of Hymns for the Use of the People Called Methodists. I have divided the paper into two sections: (1) congregational singing and the Methodist movement, and (2) congregational singing and the Methodist worship. Finally, to solicit further discussion and reflection on the nature of congregational singing in church worship, I summarize the Wesleyan features of congregational singing and reflect on their implications for contemporary Methodist worship in the ecclesiastical context of Taiwan.