Intelligent header box and photovoltaic system thereof

The invention discloses an intelligent header box and a photovoltaic system thereof. The intelligent header box is used for converging current of at least two paths of solar cell panel set strings into one path to output and comprises a detection module, a processing module and a control module; the detection module, the processing module and the control module are connected in sequence; by detecting the voltage of the solar cell panel set strings and comparing the voltage with a preset voltage value, when the voltage is smaller than the preset voltage value, the paths of solar cell panel set strings automatically bypass and are not accessed to a circuit; when the voltage is larger than the preset voltage value, the paths of solar cell panel set strings are accessed to the circuit; and therefore, the intelligent header box has intelligent identification and control functions and avoids the situation that the whole power generation efficiency of the photovoltaic system is influenced because certain paths of solar cell panel set strings accessed into the circuit do not generate power or generate little power, thereby improving the whole power generation efficiency of the photovoltaic system.