Innovation is the source of competitive advantage for enterprises. In the context of global industrial upgrading and increasingly fierce technological competition, enhancing innovation capabilities is key to enterprises’ success. Technology mergers and acquisitions have become an important way for enterprises to acquire external technology, to enhance their innovation capabilities, and to achieve rapid development. Many scholars have extensively researched technology mergers and acquisitions and enterprise innovation. This paper summarizes the relevant research literature according to different research contents. The research content includes the motivation for technology mergers and acquisitions, analyzing the impact mechanism and the path of technology mergers and acquisitions regarding enterprise innovation from the perspectives of technology relevance, the technology absorption capacity, the institutional environment, and corporate governance, as well as related research on the consequences of technology mergers and acquisitions for enterprise innovation and measuring methods for technology mergers and acquisitions and enterprise innovation. This paper summarizes and organizes the relevant literature, aiming to find research directions and enrich future research fields by summarizing it. This effort provides important theoretical support for the strategic decision-making of enterprise technology mergers and acquisitions under the guidance of innovation, and it also provides a reference for further optimizing the innovation incentive environment.