The invention discloses a novel water tank. The novel water tank mainly comprises a water inlet, a water tank body, a sterilizer assembly, a water quality detector assembly, an outer ladder, an inner ladder, access holes, a water outlet and heaters, wherein the water inlet and the water outlet consist of flow sensors, water leakage alarm devices, pressure limiting valves and filter screens; the water tank wall is made of an organic-inorganic (a middle layer is additionally arranged in the middle) glass fiber reinforced plastic material; a plurality of heaters are uniformly arranged on the inner wall of the water tank; the sterilizer assembly, the water quality detector assembly and a master console are embedded on the outer wall of the water tank body. The water tank is a novel multifunctional water tank which combines detection, cleaning, sterilization and heating functions; the reliability of the water tank is greatly higher than that of the conventional water tank; the water tank is convenient to mount and maintain, and has the advantages of complete functions and high cost performance; the use space is saved better and the use cost is reduced; the device is suitable for being applied to various fields and thus has good market value and application prospect.