The Shared Mixed-Reality Space is a space where multiple people share a mixed reality world and communicate with each other. We handle not only virtual objects but also virtualized real objects in the space, and share important information even over different spaces or time. In this paper, we propose a new method for sharing attentions among people by detecting and capturing typical situation which a person is giving important explanation on an object, and by giving video clips to other people. This paper presents the basic idea, the multiple sensors simultaneously tracking important objects, and the annotation capturing mechanism.