In this paper, we will present the results of WDM-PON based FTTH field trial test which held in the city of Gwangju. We have implemented injection locked FP-LD based WDM-PON system and reliably delivered IP-TV, N-PVR, HD-VoD, EoD and Internet service as FTTH service through the system during the field trial test. We have also verified that the WDM-PON system worked well to provide QoS guaranteed 100Mbps bandwidth per subscriber. Furthermore, we have presented network designing issues in OSP and CPN that should be overcome to efficiently deploy FTTH service. Finally, based on the field trial test results, we proposed FTTH service deployment strategies.