The Multi-Service Access Network (MSAN) is the best choice for the new-generation broadband access network and for integrating multi-networks into one. In this paper, we investigated characteristics, the network architecture and the migration trend of the MSAN. Two types of the network architecture of the MSAN have been proposed and compared. Furthermore, multi-service engineering technologies, broadband access technologies, Very-high-bit-rate Digital Subscriber Lines 2 (VDSL2), TDM over IP and packet telephony, and the quality of service for triple-play services used by the MSAN are also analyzed by theorem and experiment. The proposed scheme was applied in the field and work well.