The invention discloses a state acquisition system for primary and secondary equipment of an intelligent substation. The system comprises a transformer substation remote signaling device, a transformer substation remote measuring device, a network message receiving and transmitting device and a data processing device. The states of the primary and secondary equipment are sensed through the transformer substation remote signaling device, the transformer substation remote sensing device and the network message receiving and transmitting device and are collected together by the data processing device, wherein the state sensing quantities of the primary and secondary equipment comprise remote signaling positions of a primary equipment switch and a knife switch; the voltage and current remote measurement quantities of the primary equipment; the state of a protection and automatic installation device: whether to give an alarm or be locked or not and whether to be overhauled; and the states of a merging unit and an intelligent terminal device: whether to give an alarm or be locked or not and whether to be overhauled. The states of the primary and secondary equipment of the intelligent substation can be rapidly and timely acquired, and whether the actually sensed state corresponding relation is consistent with the previously established corresponding relation or not can be subsequentlycompared and judged.