Research objective; China has few open access conversion practices, lack of negotiation experience and conversion practice as a whole, and no consensus has been reached on the open access conversion strategy at this stage in China. This study will conduct current situation investigation and case analysis combined with ESAC data, in order to explore an effective path suitable for promoting the open access conversion process in China and accelerate the open access conversion. Promote the flow of scientific research results. [Research methods] This study mainly used statistical analysis and content analysis to investigate the contents of ESAC registration open access conversion protocol, analyze the development status of global open access conversion protocol, select foreign representative national conversion cases and single institution conversion cases to analyze their conversion process and effects, and summarize the effective experience of foreign open access conversion. As of February 29, 2024, ESAC registered a total of 960 global open conversion agreements, involving 78 countries, 64 publishers and 203 institutions involved in conversion, with an uneven global distribution and concentration in developed countries. Combined with case studies and individual circumstances, Chinese research institutions should develop long-term open access conversion plans and carry out preliminary demand research before negotiations to provide a strong reference for scientific negotiations.