The invention discloses a power-driven hydraulic hydrology tour gauging car which comprises a car body. A vehicle-mounted storage battery and a hydrology tour gauging device are arranged on the car body and electrically connected. By means of the technical scheme, compared with the prior art, a power unit is transferred into a hydrographic winch, a cable is led out from the vehicle-mounted storage battery to be connected with the power unit, a power generating system of the car is used for driving the power unit to provide a hydraulic power source for the hydrology tour gauging car, pressure loss is little, overall disassembly and maintenance is facilitated due to the compact structure, and reliability is high; the power unit can work intermittently according to the needs of actions of the hydrographic winch, so that environment protection and energy conservation are achieved, oil temperature is prevented from being too high, and the high-performance design requirement of the tour gauging car is met. The power-driven hydraulic hydrology tour gauging car solves the problems that power is shared by all car types, connecting pipelines of the winch and the car are too many, the winch is not easy to disassemble, and the temperature of hydraulic oil is too high due to long-time continuous flow gauging.