Documenting the development of religious practices as social movements is very significant, and is a new scientific perspective. This research seeks to set relations between classical cult associations and Coptic Monasticism in Egypt, in order to present a new approach on religious practices development in Egypt through ages. Thus, research objectives are: illustrating the types, dedicated deities, memberships, structures and bylaws of cult associations in Ptolemaic and early Roman Egypt; and discussing the influence of them on early Christ groups and Coptic Monasticism; through, establishing the relationship between cult associations and early Coenobitic Monasticism fathers' instructions and regulations. Despite, research obstacle is no direct relations between them, through epigraphical and papyrological documents, Research hypothesis is that cult associations played a vital role in the appearance of Coenobitic Monasticism during Christian Egypt. Research draws on a two-tiered methodological approach: analyzing of primary sources and secondary; and interpretation of papyrological texts through theoretical frameworks, to realize religious practices and social aspects during Ptolemaic and Coptic Egypt.