The invention relates to an intelligent response control electrical desalting and dewatering electric field device belonging to the technical field of crude oil processing. The device comprises an oil inlet distributor and at least two layers of horizontal high-voltage electrode plates, wherein the high-voltage electrode plates are connected with a voltage output circuit controlled by a PLC, the oil inlet distributor is formed by branch pipelines which are mutually isolated, oil inlet spray nozzles are arranged on the branch pipelines and are positioned between the adjacent horizontal high-voltage electrode plates, the ejection direction of the oil inlet spray nozzles is parallel to the horizontal high-voltage electrode plates, and annular electrode plates surrounding the oil inlet spray nozzles are respectively and oppositely extended out on the two adjacent horizontal high-voltage electrode plates, so that a dispersion mixed area positioned between the two opposite annular electrodeplates and an accumulating sedimentation area positioned at the periphery of annular electrodes are formed, and the electric-field intensity of the dispersion mixed area is greater than that of the accumulating sedimentation area. The invention realizes the organic combination of an electric dispersion mixed technique and an accumulating sedimentation technique, enables the mixing of crude oil and water droplets to reach a best effect and obviously improves the desalting effect; and compared with the traditional electrical desalting technique, the invention can save water by more than 50%.