The purpose of this research is to clarify the power of explanation for the model predicting environment-conscious behavioral intentions by making a comparison between Chinese high school students, university students, and adult females. Questionnaires about environment-conscious behavioral intentions concerning four environmental problems (water resource dryness, water pollution, air pollution, and energy shortage), and determinants of the intentions assumed by the three models (the collective protection motivation model: Fukada & Tozuka, 2001; the model regarding environment-conscious behaviors and those determinants: Hirose, 1994; the model of psychological processes leading to behavior: Koike et al., 2003) were distributed. The following results were obtained using the data of 127 high school students, 288 university students, and 106 adult females. Differences among the three groups in the average power of explanation of the model of psychological processes leading to behavior were not seen. However, differences among the three groups in the average power of explanation of the collective protection motivation model and the model regarding environment-conscious behaviors and those determinants were seen: highest in adult females and lowest in university students. It also became clear that the dispersion of the power of explanation of the models was the biggest in adult females.