The Korean government announced it was carbon-neutral in October 2021. In addition, as a follow-up, the government maintains related laws and systems and invests in facilitating research and technology development extensively. Government investment is ultimately the people’s taxes, and for laws and systems, the people’s support and interest are of importance. This study investigated carbon-neutral technologies of an expert group and the public, technology acceptance, and recommendation intention. The results of the study are as follows. First, the goodness-of-fit of the proposed model and its structure had a positive impact on technology acceptance (recommendation) intention. Second, the result of a multi-group comparative analysis of the impacts on the acceptance of carbon-neutral technologies by the public and experts was overall at an acceptable level. Third, as for perceptions about climate technologies among experts and the public, it was found that there were differences in effort expectancy, facilitating conditions, and network effects between the expert group and the public.