Abstract: Technology convergence is a major driving force for emerging sectors and industrial upgrading. Using converging indexes and community analysis, this paper conducts a comparative study on the evolutionary patterns of technology convergence in the IT, automobile, and equipment manufacturing industries. Based on 1985-2014 patent files and their IPC co-occurrence data from the three industries, the results show: there is a clear pattern of preferential attachment which leads to the growth of star technological fields with high level of local and architectural converging force; the early stage is characterized of a number of disparate and small groups of converging technological fields, whereas the later stage is featured with a rapid growth of star communities of technological fields and their blurring boundaries; compared to the automobile and equipment manufacturing industries, the IT industry reveals higher level of skewed distribution that is described by a even fewer architectural technological fields and star communities.