Abstract: The present invention provides a solar ventilator and a ventilating system with the solar ventilator, wherein the solar ventilator comprises: a solar panel, a shell pedestal, a horizontal-shaft fan, a controller, an energy storage unit; as the cover plate of the horizontal-shaft fan is set onto the grid plate of the shell pedestal, and the horizontal-shaft fan is aligned with the shell pedestal's air intake and air outlet, meanwhile the controller and the energy storage unit are accommodated into the shell pedestal, so the solar panel can be incorporated onto the top surface of the shell pedestal to form a solar ventilator. The solar ventilator can also be applied to the external surface or interlayer of the roof of the building to form a ventilating system as a novel utility model with better applicability.