Disclosed are a customized oral care system, an oral care device, an application system and a method for providing the same. According to an embodiment of the present invention, the customized oral care system comprises: an oral care device including a detection unit for detecting a motion state of a toothbrush head and a communication unit for communicating with a user device and transmitting the motion state detected by the detection unit to the user device; and an application system installed in the user device. The application system includes: a communication module for performing communication with the oral care device; a storage module for storing an oral image in which an oral structure of the user is rendered and recommended behavior information of a user including recommended exercise information of the oral care device for each oral area of the user, which is set based on the oral image; an operation analysis module for dividing the oral image into a plurality of sections and analyzing operation information according to the motion state of the toothbrush head detected by the detection unit for each of the plurality of divided sections; and a control module for displaying a tooth-brushing result for each oral region on the oral image on the user device, based on the operation information analyzed by the operation analysis module and the recommended behavior information.COPYRIGHT KIPO 2017