The invention relates to a liquid ration taking device, in particular to a liquid measurement device provided with an internally-arranged liquid measurement pipe. The liquid measurement device comprises a cup body, a cup cover, a liquid guide pipe, the liquid measurement pipe, a liquid guide plate, a liquid outlet, and a liquid outlet cover. The liquid guide plate is arranged above the inside of the cup body and in parallel with the bottom of the cup body, the liquid measurement pipe is arranged on one side of the inside of the cup body, and the upper end of the liquid measurement pipe is inserted in the lower end of the liquid guide pipe on the liquid guide plate. The liquid outlet is arranged on one side of the cup cover, and the liquid outlet cover covers the liquid outlet. The upper end of the liquid guide pipe is communicated with the liquid outlet. The liquid measurement device is simple and reasonable in structure, convenient to operate, especially suitable for measuring and taking of volatile toxic liquid, and reversible in operation, and liquid contained in a container can be taken in ration freely.