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Triboelectric nanogenerator (TENG) has great potential in harvesting low‐frequency environmental mechanical energy, but the unavoidable friction between tribo‐layers limits the frequency range and efficiency of energy harvesting. Herein, a lower friction and high‐performance triboelectric–electromagnetic hybrid nanogenerator (TE‐HNG) is proposed to harvest broadband rotation energy. The compact sleeve multi‐unit TENG and electromagnetic generator are integrated to achieve respective complementary in electrical output and energy harvesting frequencies. The charge‐supplement type TENG with a single arched fluorinated ethylene propylene film design can not only supplement the charge dissipation of the Nylon surface in time but also ensure the stable output of TENG. The influences of the rotation speed on the electrical output and optimal load of TENG are systematically studied. As a self‐powered active wind speed sensor, the TE‐HNG device can detect the wind speed as low as 1 m s−1, which indicates that the TE‐HNG can harvest broadband wind energy (≈1 m s−1). Triggered by the wind, the TE‐HNG device can not only power the temperature/humidity sensor to work steadily and continuously but also realize the full‐automatic and self‐powered operation of the environmental meteorological monitoring system by combining the energy management and wireless transmission module. [ABSTRACT FROM AUTHOR]