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Recently, smart spaces are being created using RFID or USN technologies in ubiquitous computing environments, and the number of researches and applications related with context-aware systems, which process sensed data collected from numerous sensors and provide automated services properly according to situations, are ever increasing. There are also sharp increase in demands and needs for location-based services using location information, due to the development of wireless internet and mobile systems. This paper proposes a system which allows the users to access desired services by interacting with service providers at any place in various smart spaces using mobile devices such as smart phones. We propose the Location-based Context-Aware Web Service Framework, so called LOCA Framework, by applying SOA model as a way of satisfying these requirements.