Abstract: The ionome was defined as total of all ions including all the metals, metalloids, and nonmetals present in an organism. The development of high-throughput analytical technology such as ICP-MS/OES makes it possible for the quantitative and simultaneous measurement of the elemental composition in plants. Based on this technology, ionomics was developed to illuminate systematically the genetic network and molecular mechanism of plant ion homeostasis by analyzing and comparing genomic-scale ionome. Since the rapid progress in recent years, ionomics was widely used in functional genomic research, etc, and becomes a hotspot field in plant nutrition. This paper makes a brief review on plant ionomics from the following aspects: the concept of ionome and ionomics, technology platform, methodology, information management of ionomics and its applications. Moreover, this paper put forward some questions and prospects in current study.