A high precision inductance measuring device based on a dual-source automatic balanced bridge is built in order to achieve high precision, high efficiency and wide range inductance measurement. The device automatically adjusts the bridge to balance and measures the ratio of voltage across the bridge in order to calculate the inductance. Digital phase sensitive detection and parsimonious Newtonian iteration are applied to ensure that the balancing point can be found efficiently and accurately. A sampling system based on high-speed digitizers can increase precision and range of measurement. In typical frequencies including 100Hz, 1kHz and 10kHz, inductances in 10μH~10H can be measured by this device through adjusting the bridge to balance. The device can achieve a measurement stability of 5×10-6 during 90 minutes, and its accuracy is consistent with Impedance Analyzer Agilent E4980, which can be experimentally verified.