Nowadays, most of IT information service system are lack of resources localization ability and only provide simple data query. Therefore, I analyse the drawback in the current information service models, and propose unified search structure based on information integration framework to improve information search quality. This model consists of two components . Firstly, in order to form data collection as the source of information, distributed heterogeneous data is extracted, transformed and aggregated by the information integration module. Secondly, according to Internet Search Engine model and COMPASS framework, different types, size and themes data is queried and displayed in a unified way. This enhances system information integration capabilities and shows powerful expansibility. What is more important is our proposed system extremely promotes user’s information localization ability and using experience as Baidu or Google. Finally, this model is successfully applied to the information management and service platform development, which is one of the Eleventh Five-year informationization projects of Chinese Academy of Sciences.