The present invention provides a photovoltaic output power self-adjusting device. The device comprises a solar cell panel rotating module, a sun monitoring module, a wind power and wind direction monitoring module, a control module and a power storage module. The solar cell panel rotating module is fixed on the ground. The sun monitoring module and the wind power and wind direction monitoring module are respectively fixed on a platform higher than the horizontal placement position of a solar cell panel. The control module is respectively connected with the solar cell panel rotating module, the sun monitoring module and the wind power and wind direction monitoring module. The power storage module is respectively connected with the solar cell panel rotating module, the sun monitoring module, the wind power and wind direction monitoring module and the control module. The photovoltaic output power self-adjusting device improves the efficiency, the accuracy and the safety of related equipment itself. Meanwhile, the solar cell panel is always in an optimal working state.