The study mainly concerns the relationship between technology and privacy. It focuses on the idea that the development of science and technology to a great extent comes from people's changing recognition of and practices of privacy. Inspired by the philosophy of technology and then through the observation of layperson's daily practices from ethnomethodological perspective, the study examines how wearable devices with self-tracking technology ＂re-shape＂ people's understanding of privacy with an emphasis on a transformation from ＂information as body's environment＂ to ＂information as body's environment＂. The discussion of the transformation leads to at least two concluding remarks. On one hand, ＂privacy no more＂ indicates that people's privacy practices with self-tracking technology are not necessarily maintaining or solidifying the traditional viewpoint of privacy; instead, they are used to construct a different one. On the other hand, privacy may not be value-free; rather, it emerges from the distinction of information and body. The concept of privacy re-shaped by self-tracking technology becomes reflexively an ongoing accomplishment. The aim of the study is to investigate how people's ＂doing privacy＂ is accomplished with the intervention of self-tracking technology, whether voluntarily or not, and to contribute to a further understanding of the relationship between privacy and technology.