EPON and GPON have their own advantages and disadvantages. GPON is superior to EPON in terms of performance indicators. However, EPON has advantages in time and cost. GPON is catching up. Looking forward to the future broadband access market, it may not be a substitute for others, but coexistence and complementarity. For customers with high bandwidth, multi-service, QoS and security requirements and ATM technology as the backbone network, GPON will be more suitable. For cost-sensitive, QoS, and low-security customer groups, EPON has become the dominant one.