Low-carbon economy has played an important role in green energy economics in last two decades. The number of studies conducted on low-carbon economy has increased steadily since 1990 and now in a fast-growing stage of its academic articles' production life cycle. An increasing number of scholars have paid their attentions to low carbon economy research. Hence, the low-carbon economy has been an important and popular topic in the past 30 years as evidenced by numerous papers in journals listed in several subject categories in the Web of Science (WoS) online database. This research reviewed more than 14,000 bibliographic records from the Science Citation Index and Social Science Citation Index of WoS. In this work, paper citations, subject categories, cited journals, top countries, productive institutes, authors, cited references and publications' citations or research collaborations are analysed from published literature. We have found that the top three productive journals in low-carbon economy research are Energy Policy, Renewable and Sustainable Energy Reviews and Journal of Cleaner Production. The U.S. has an apparent advantage in the quantity and quality of low-carbon economy research. In addition, the U.S. is in the centre of international collaboration networks, including two top productive institutes, which summarized as University of California Berkeley and Carnegie Mellon University accordingly. An overall trend of the developing analysis of low-carbon economy research can provide a clear knowledge map and deep understanding of academic research on low-carbon economy.