This study is mainly to research interactive exhibition and family-audience between the relationships with behavior. It attempts to explore all of audience's behavior occurred in the exhibition space via non-participating observance. The research area is including laser holography, chaotic symptom, distorted vision and physics science exhibition of the science center in national museum of natural science. Particularly, we focus the family-audience attention on the behavior interaction and learning interaction to observe the relationship with interactive exhibition. The observance finds that it is the family-audience prefers to the exhibition near the entrance. The good interactive exhibition has its effect to the learning of family-audience than other exhibitions. In part of time, the family-audience takes the rest and other things. Most of the parents always answer the question of children and teach how to participate the exhibition. The children visitors have not read the explanation of exhibition when they visit the exhibition. After all, the good interactive exhibition indeed can help the family-audience to learn the things in science center.