This paper reviews the research on MXene, a two-dimensional material that has the potential to be used in next-generation electronic devices. Due to its unique electrical, mechanical, and surface properties, MXene has emerged as a promising candidate for the development of memristor devices and gas sensors. The paper provides an extensive overview of the state-of-the-art in MXene-based memristors and gas sensors, covering topics such as synthesis techniques, intrinsic properties, and a wide range of potential applications. In particular, the tunability of MXene and its ability to modify its electrical properties through surface functionalization are emphasized, allowing for precise control over device performance.