Environmental problems nowadays pose threats to the sustainability of environment, such as global warming, urban air pollution, water scarcity, environmental noise, and biodiversity loss. The root cause of those problems is human behavior. Inspiring the interest of preschoolers is crucial in their future cognition of the environment. This research discussed the influence of parent-child reading on the children's environmental interest. It also integrated environmental education into the learning process of preschoolers more comprehensively and continuously. A questionnaire was used for data collection and the data were analyzed using Smart PLS 2.0. The results show that personality trait, visual attention, and expression of ideas have statistical significance in terms of the children's learning attitude. The picture book designed in this study can improve the pro-environmental behavior after parent-child reading.