Disclosed are an intelligent water purifier and a control method therefor. The intelligent water purifier comprises a water supply unit, a filter element, a water quality sensor, a master controller and a communication module, wherein the water supply unit is connected to the filter element, and the filter element is used for purifying a water body; the water quality sensor is arranged corresponding to a water output pipeline of the filter element, and the water quality sensor is used for testing the water body which is purified by the filter element, so as to acquire water quality information of the purified water body; the master controller is respectively connected to the water quality sensor and the communication module, and the master controller is used for acquiring the water quality information, determining, according to the water quality information, whether the filter element fails, and generating first alarm information when the filter element fails; and the communication module is used for establishing a communication connection between the master controller and an external device, such that the master controller sends the first alarm information to the external device by means of the communication connection with the external device. The state of a filter element can be effectively monitored, such that a user can rationally change the filter element, thereby protecting the health of a user and also preventing the waste of resources.