The invention discloses an intelligent water purifier capable of detecting the PH value of water and relates to the technical field of water purifiers. The intelligent water purifier comprises a waterpurifier body, a set of detection devices and a control device. Each detection device comprises a shell and a cover, a supporting plate is fixed in each shell, and a blocking plate is fixed between one surface of each supporting plate and the inner bottom face of the corresponding shell; a water conveying pipe fixedly penetrates through each blocking plate, an electromagnetic flow valve is arranged in each water conveying pipe, and an L-shaped pipe and a connection pipe fixedly penetrate through the bottom face of each shell; electromagnetic switch valves are fixed to the L-shaped pipes and the connection pipes, one surface of each cover is fixedly connected with one surface of the corresponding shell, and a set of water division plates and a water retaining plate are fixed to one surfaceof each cover; the water division plates are provided with multiple water-permeable holes, and a water guide plate is fixed to the surfaces of every two water division plates. According to the intelligent water purifier, through every two water division plates and the corresponding water retaining plate, the water-permeable holes are designed in the water division plates and can buffer impact force of water, and the problem is solved that due to too high water flow speed or large impact force, the detection effect is poor.