Abstract <p>N⁶-methyladenosine (m⁶A) modification is one of the most common reversible epitranscriptomic modifications in eukaryotic mRNA. It is coordinately regulated by methyltransferases (writers), demethylases (erasers), and reader proteins, which together maintain the dynamic balance of m⁶A modification within cells. As key functional components of the m⁶A modification system, demethylases specifically recognize and remove m⁶A modifications from RNA molecules, thereby playing important roles in gene expression regulation. In recent years, studies on m⁶A demethylases (such as FTO and ALKBH5) in animals have advanced considerably, revealing their extensive functions in development, metabolism, and disease. In contrast, research on these enzymes in plants started later but has progressed rapidly. Accumulating evidence indicates that plant m⁶A demethylases also regulate the stability and function of various protein substrates, exerting multidimensional regulatory roles in key biological processes, including growth and development, immune responses, and abiotic stress responses. This review systematically summarizes recent progress on plant m⁶A demethylases in these areas, with a focus on their functions in growth and development, immune stress responses, and abiotic stress responses. In addition, we discuss key challenges in the field, such as the substrate recognition mechanisms of demethylases, their tissue‑specific regulatory patterns, and their synergistic interactions with other epigenetic modifications. Future research directions are also proposed to provide a reference for deeper understanding of the dynamic regulatory network of plant m⁶A modification and its potential applications in crop improvement.</p>