The present invention provides a multi-spectrum generating device and method thereof. The multi-spectrum generating device includes at least one first luminaire, at least one second luminaire, and a control component. The first luminaire and the second luminaire each have a light source. The control component is connected to the first luminaire and the second luminaire for controlling the first luminaire and the second luminaire. In the present application, by controlling the switches of the first luminaire and the second luminaire, the multi-spectrum can be realized, so as to meet some special requirements of photobiological regulation. Moreover, the first luminaire and the second luminaire are mutually independently controlled luminaires and are controlled by different power sources, so the control circuit is simple and has a low cost, without affecting the primary demanded spectra provided by the first luminaire. Therefore, the present application has high utilization rate and high flexibility in use.
