The invention belongs to the technical field of reactive compensation equipment, and especially relates to an intelligent capacitor group operation state and parameter monitoring device. The device is composed of a liquid crystal display screen, a button operation panel, a single-chip microcomputer and RS485 communication ports. Operation states and parameters of an intelligent capacitor group are transmitted to the single-chip microcomputer through RS485 communication. The single-chip microcomputer displays the information on the liquid crystal display screen. The single-chip microcomputer converts operation information on the button operation panel into control instructions, and the control instructions are transmitted to the intelligent capacitor group through RS485 communication. The monitoring over the operation states and parameters of the intelligent capacitor group is realized. The device provided by the invention can be installed on a surface of an intelligent capacitor whole-set cabinet, the state of each intelligent capacitor is conveniently and visually displayed, the intelligent capacitor group is simply and conveniently controlled, and the popularization value is very high.