Biodiversity valuation is the basis for effective global biodiversity conservation, natural resource sustainability as well as biodiversity mainstreaming policymaking. It is essential for quantifying nature's contribution to human well-being and promoting sustainable development. It has become an important component of several international biodiversity conservation frameworks. Firstly, the study systematically sorted the number of articles, research hotspots, trends, and representative results of biodiversity valuation studies in Web of Science Core Collection and CNKI databases by utilizing CiteSpace software. Research on biodiversity valuation theory began in the 1990s, recognizing that biodiversity has both instrumental and intrinsic value. The 1990s and 2000s were the foundational period of biodiversity valuation research, forming the far-reaching Total Economic Value framework. From the beginning of the 21st century to the present, research on biodiversity value has developed at a rapid pace, focusing on biodiversity in part of species richness, ecosystem services, functional diversity, climate change, sustainable development. In global ecological research, biodiversity value has become a hot topic. Secondly, based on the research status, the connotation of biodiversity value and the classification system of biodiversity economic value were briefly described. From the economic perspective, it is divided into use value and non-use value, and the secondary classification includes direct use value, indirect use value, option value, bequest value, and existence value. From the perspective of ecosystem diversity value, it is divided into provision services value, regulating services value, and culture services value. Thirdly, the concept, characteristics, and application scenarios of the three types of biodiversity valuation methods, the actual market method, the alternative market method, and the hypothetical market method were explained based on the relationship between biodiversity goods and the trading market. According to the TEV framework, the valuation methods applicable to each type of value are compared and summarised. Combined with case studies, it introduces the application of the functional-value idea, the equivalent factor idea, the willingness-to-pay idea, bioprospecting agreements, and biodiversity credit in valuation practice. Finally, to address the shortcomings of value assessment research, future research proposals are made in the following three aspects: (1) Improve the methodological research on the connotation of biodiversity value and the value classification system. (2) Establish biodiversity value assessment norms and explore the construction of an integrated or sub-dimensional value assessment index system. (3) Strengthen the link between biodiversity value and the national economic accounting system to promote the mainstreaming of biodiversity. This paper can provide support for biodiversity conservation and biodiversity value research.