NTIS (National science and Technology Information Service) is a national R&D information portal service. NTIS gathers R&D information from the representative R&D management organization under each ministry. Due to the different methods adopted by each organization for the information connection, integration of such information through NTIS was inefficient. In this paper we compare information integration methods, and then design an information integration platform for the purpose of standardizing information integration. Based on the information integration platform, we also propose a model for NTIS information integration.