Abstract: Individual-well metering is one of the important links in oil field development and producing process, Currently, Daqing Oilfield uses the high cost tipping-bucket metering technique, In order to reduce the cost and increase the gauging stability at the same time, the thermal individual-well apparatus is developed, the working principle of which is to calculate the producing liquid amount of individual well by measuring the temperature increase ΔT of the liquid, which flows through the metering apparatus, The apparatus is composed of heater, thermal sensor and pre-processing electrical circuit, etc, Also, the high-precision thermal transducer is utilized to measure the temperature difference ΔT The key points of determining the heating power, optimization of apparatus structure, data access and post replay, etc, are also investigated, Field applications show that the apparatus can not only increase the metering stability and accuracy, but also realize the online monitoring and continuous gauging at lower cost with a broad application prospect.