This study tried to investigate the effect of public service announcements on climate change, focusing on the concept of usefulness. As a result of conducting a survey on college students, those with a high sense of self-efficacy, perceived the usefulness of public service announcements highly. People with high self-efficacy also showed favorable utilitarian attitude toward public service announcements. However, there was no significant relationship between self-efficacy and hedonic attitude toward public service announcements. Next, it was found that both utilitarian and hedonic attitudes toward public service announcements were positive for those who perceived the usefulness of public service announcements highly. However, it was found that people with a high awareness of usefulness did not actively participate in actions to solve climate change problems. People with a favorable functional attitude toward public service announcements had a higher intention to participate in problem solving, but those with a favorable hedonistic attitude showed no difference in their intention to participate. The results of this study show the importance of the usefulness perception of public service announcements and have academic significance in how climate change public service announcements are recognized. It also provides practical implications for effective implementation of public service announcements on climate change.