The notion of vehicle-to-everything (V2X) has been adopted and developed in a host of application scenarios due to its wide compatibility with intelligent transport, smart city or other relevant concepts since it was set forth. Bene ting from the application of advanced technologies, vehicles are connected with more and more objects, such as vehicle-to-unmanned aerial vehicles (V2U), vehicle-to-subway (V2S), etc., making the application scenarios of V2X constantly updated. Narrative reviews for speci c V2X, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), or vehicle-to-grid (V2G), rather than a comprehensive review of V2X, cannot provide a reference for a broader and comprehensive application of V2X. Therefore, this study rst investigates the knowledge landscape of V2X publications by bibliometric analysis to portray the theme evolution and outline of V2X research. Then, the applications of V2X are then summarized into communication, computation, and service scenarios, and their forms, supporting technologies, and challenges are reviewed. The relationships and synergistic development in various V2X are also discussed. This holistic insight is necessary to help researchers connect the sub-concepts of V2X for the synergistic development of various V2X.OR TS=(V2N) OR TS=(V2I) OR TS=(V2U) OR TS=(V2H)) AND TS=(vehicle), with TS as the topic, the language is English, and the literature type is the article. This study compiles all papers released up to October 13, 2022, without any time restrictions. Based on the above search protocol, 4,097 records were retrieved, and 2,989 records remain after eliminating the literature unrelated to the research subject. The primary information and descriptive statistics are shown in Table 1.