Recently android phone and iPhone have become a regular part of our lives in Japan. With the development of these telecommunication technologies and the pervading applications, personal information that we call big data recently has exploded and been dispersed throughout the society. While companies make use of these data for marketing purposes and also government discuss about social systems, individuals have not only difficulties to access, but also do not have any means to benefit from their own data, even though they are generated by themselves. In this paper, we propose a framework that enables individuals to use it and receive a proper reward from companies. We aimed to give the power of personal data back to individuals. Especially we focus on buying information, and discuss how to handle it and propose a self-control method of own personal data to receive various personalized services.