[Purpose/significance] Technology convergence is a significant means of technological innovation, plays an important role in economic and social development, and has gradually become an important part of the national science and technology strategy. [Method/process] On the base of the summary of its concept and the clarification of its significance of technology convergence study, the paper pointed out its research stages, and made comparative analysis of the methods in data collection, technosphere identification and convergence analysis. [Result/conclusion] Finally, it concludes the shortages of existing studies and the further research directions, which can deepen the study on technology convergence.